Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
substantial subjects
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "substantial subjects" is correct and usable in written English.
It can be used to refer to important or significant topics or themes in a discussion or analysis. Example: "In our seminar, we will explore substantial subjects related to climate change and its impact on global economies."
✓ Grammatically correct
News & Media
Science
Encyclopedias
Alternative expressions(7)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
2 human-written examples
"It's somehow considered a lightweight section, and therefore there's a belief that certain substantial subjects should be off limits".
News & Media
Yes, young people live in a world of Facebook "likes" and internet memes and "winning" and "fail" -- it doesn't mean that MTV should once again mirror and perpetuate that kind of lowest-common-denominator anti-thinking in an effort to introduce American kids to one of the most substantial subjects in the world.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Young people need to display substantial subject knowledge as part of the examination process.
News & Media
"We had been looking around for a special to do and we wanted a really substantial subject.
News & Media
Even so, were I a reader who had written in on a reasonably substantial subject, then seen no result, I would be wondering, what gives?
News & Media
In the cases of both this and Here We Go, the playwrights are tackling such substantial subject matter – Churchill taking on death, Bartlett dealing with office politics – in texts dense with language and ideas that audiences do not feel shortchanged, especially as the theatres have sensibly reduced ticket prices, the Vic charging £10-£25 £10-£25l and the National pricing Here We Go at £15.
News & Media
Not until the late 1960s did the discipline's ideas begin to influence mainstream economics.In this section The law is an ass Three's company Better news in East Asia Latin America seeks shelter Control freaks An electronic bolt from the blue Marsh attacks ReprintsAs the weighty new dictionary amply illustrates, law and economics is now a substantial subject.
News & Media
Plots of headache days at an individual-level revealed substantial subject-specific differences and striking curvatures (Additional file 1: Figure. S1).
He views this subject as neither the substantial subject of Descartes, nor the Kantian "I think" that can accompany any possible experience, rather it is a subject which has itself been constituted by a dialectic of physical and vital structures.
Science
Although between-subject differences accounted for a large portion of the total variance, there was still substantial within-subject variability (CVWS = 45%).
These findings may be partly attributable to substantial inter-subject data variability and the modest sample size of the study populations.
Science
Expert writing Tips
Best practice
Use "substantial subjects" when you want to emphasize the significance and depth of the topics being discussed. It's suitable for academic, formal, and journalistic contexts.
Common error
While "substantial subjects" is grammatically correct, it may sound overly formal in casual conversations or informal writing. Opt for simpler alternatives like "important topics" or "key issues" in less formal settings.
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "substantial subjects" functions as a noun phrase where "substantial" is an adjective modifying the noun "subjects". As per Ludwig AI, the phrase is grammatically correct and usable in written English.
Frequent in
Science
34%
News & Media
31%
Encyclopedias
7%
Less common in
Formal & Business
2%
Social Media
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "substantial subjects" is a grammatically sound phrase used to denote important or significant topics. Ludwig AI confirms its correctness and usability, though its frequency is uncommon. Predominantly found in science, news and media, and encyclopedic contexts, the phrase carries a neutral to formal register. While appropriate for academic, journalistic, and professional settings, simpler alternatives might be preferred in casual contexts. When aiming to underscore the importance and depth of a topic, "substantial subjects" serves as a precise and effective choice.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
significant topics
Emphasizes the importance or noteworthiness of the topics.
important issues
Focuses on the relevance and significance of the matters at hand.
key themes
Highlights the central and recurring ideas within a body of work or discussion.
major topics
Indicates the prominence and scale of the subjects being discussed.
critical areas
Stresses the urgency and necessity of addressing certain subjects.
essential themes
Underscores the fundamental nature of the themes.
weighty matters
Implies seriousness and significance of the topics.
notable subjects
Highlights subjects that are worthy of attention.
serious issues
Emphasizes the gravity and potential consequences of the issues.
profound themes
Highlights the depth and insightfulness of the themes.
FAQs
How can I use "substantial subjects" in a sentence?
"Substantial subjects" is used to describe topics that are important or significant. For instance, "The curriculum covers "substantial subjects" such as ethics and global economics".
What are some alternatives to "substantial subjects"?
Alternatives include "significant topics", "important issues", or "key themes", depending on the specific nuance you want to convey.
Is it better to say "substantial subjects" or "significant subjects"?
Both "substantial subjects" and "significant subjects" are grammatically correct. "Substantial" emphasizes the depth and weight of the topics, while "significant" highlights their importance or impact. The choice depends on the specific context.
In what contexts is "substantial subjects" most appropriate?
"Substantial subjects" is most appropriate in formal writing, academic discussions, or journalistic contexts where you want to convey the seriousness and depth of the topics being addressed. It might be less suitable for casual conversation.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
82%
Authority and reliability
4.5/5
Expert rating
Real-world application tested