The phrase 'prominent topic' is a correct and usable phrase in written English.
You can use it to describe topics that are particularly important or notable in a certain situation. For example, "The president's tax plan was a prominent topic of discussion at today's meeting."
Another prominent topic was drone policy.
Identity becomes an increasingly prominent topic in GCC region.
For the past month or more, it's such a prominent topic of conversation.
In Fall 2003, Sophocles' Antigone was a prominent topic on the Cornell campus.
Helped to make environmental issues a prominent topic both on the page and in national debates.
A recent flaring up of tension between age-old enemies Russia and Poland was another prominent topic this week.
Issues such as the economy, global warming, universal health care, and the Iraq war were more prominent topics of discussion.
This approach combines term ranking, localised language analysis, unsupervised topic clustering and multilingual sentiment analysis to extract prominent topics through analysis of Twitter's tweets from a period of time.
Inside the French cabinet, Germany's economic model, labor relations and capacity for technical innovation are prominent topics, with German standards — and the fear of losing Paris's AAA bond rating — driving French reforms and budget cuts.
The euro crisis and the NSA spying scandal are likely to be prominent topics while it's also expected that the Syrian conflict will loom large over the debate, particularly after Steinbrück this week backed calls within his party for Merkel to urgently travel to Moscow to discuss the crisis with Vladimir Putin and press him to intervene.
The prominent topics and potential research were captured clearly when comparing the two categories.
