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
approximately identical
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "approximately identical" is correct and usable in written English.
It can be used when describing two or more items that are very similar but not exactly the same. Example: "The two models are approximately identical in terms of features and performance, making it difficult to choose between them."
✓ Grammatically correct
Science
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
59 human-written examples
The experimental results show that the measured eigenfrequency and sensitivity are approximately identical to design values.
At large |ky| (SER regime), K and K′ band contours become approximately identical; (c) Reflection angles of K (red curve) and K′(green curve) electrons.
Science & Research
Finally, the instrument's capability for discriminating two peaks appearing in approximately identical drift times using each individual ionization source is demonstrated.
Science
The fitting parameters, critical transition force (CTF) and indentation modulus (IM) increased with increasing temperature but remained approximately identical with increasing brine concentration.
By contrast, the fracture toughness of gypsum remains approximately identical after treatment with water, half-saturated brine, and saturated brine at the same temperature.
The specularly reflected electrons are always divergently reflected and the valley states are mixed since the upper and lower 'tips' of the constant energy band contour at large |ky| are approximately identical for both K and K′ valleys.
Science & Research
The near and far-fault motions, which have approximately identical peak ground accelerations from same earthquake, are selected by representing their own characteristics (i.e., velocity, distance, etc).
Science
The reactivity ratios determined by the Kelen Tüdõs method were rβ-pinene= 1.1 and risobutylene=0.89, which indicated that the composition of copolymer is approximately identical to the monomer feed ratio.
Science
In this study comparisons are made of the results of a series of simulations for different values of the Reynolds number, but with fixed Schmidt and Prandtl numbers (Sc=Pr=0.7) and identical chemistry and approximately identical large-scale dynamics and initial scalar geometry.
Science
However, nuclear euchromatin, but not heterochromatin, appeared approximately identical to cytoplasm in elemental and water content.
Academia
Human-verified similar examples from authoritative sources
Similar Expressions
1 human-written examples
It seemed sensible to compare head extension and LBLM angles only if laryngeal exposure was maximal and approximately identical during both laryngoscopies in all patients.
Science
Expert writing Tips
Best practice
When comparing data sets or experimental results, use "approximately identical" to acknowledge minor variations while emphasizing overall similarity. This avoids overstating exact matches when subtle differences exist.
Common error
Avoid using "approximately identical" when describing items that have significant, consequential differences. Instead, choose a phrase that more accurately reflects the degree of dissimilarity.
Source & Trust
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "approximately identical" primarily functions as a pre-modifying adjective phrase, adding a degree of qualification to the adjective 'identical'. It softens the assertion of complete equivalence, acknowledging slight variations. As Ludwig AI suggests, it is correct and appropriate for written English.
Frequent in
Science
100%
Less common in
News & Media
0%
Formal & Business
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, the phrase "approximately identical" is a grammatically sound and widely used expression to denote a high level of similarity without claiming absolute equivalence. According to Ludwig AI, its suitability for written English is confirmed. Predominantly found in scientific and academic contexts, this phrase serves to accurately describe scenarios where minor variations exist, demanding precision. For situations where exact matches are unnecessary or inaccurate, it's advisable to consider phrases like "nearly identical" or "virtually identical".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
nearly identical
Omits the qualifier "approximately", indicating a slightly stronger degree of similarity.
virtually identical
Suggests a similarity that is so close as to be almost indistinguishable.
almost the same
Uses simpler language to convey the idea of close similarity.
roughly equivalent
Emphasizes a functional equivalence rather than exact sameness.
practically indistinguishable
Focuses on the difficulty of telling the items apart.
closely resemble
Shifts the focus to visual or superficial similarity.
fairly similar
Indicates a more moderate degree of similarity.
much alike
A more informal way of expressing a high degree of similarity.
comparable to
Highlights the similarity in the context of comparison.
on par with
Implies that the items are equal in quality or status.
FAQs
How can I use "approximately identical" in a sentence?
You can use "approximately identical" to describe two or more things that are very similar but not exactly the same. For example, "The two prototypes produced results that were approximately identical."
What's a good alternative to "approximately identical"?
Depending on the context, you could use alternatives like "nearly identical", "virtually identical", or "almost the same".
Is it appropriate to use "approximately identical" in formal writing?
Yes, "approximately identical" is suitable for formal writing, particularly in scientific and technical contexts, when you need to convey a high degree of similarity without claiming exact equivalence.
What's the difference between "approximately identical" and "exactly identical"?
"Approximately identical" means that things are very similar but not perfectly the same, while "exactly identical" means that things are completely the same in every way. Using "exactly identical" implies no differences whatsoever.
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
80%
Authority and reliability
4.5/5
Expert rating
Real-world application tested