What is a difference between scientist and researcher?
I would like to know if this is adequate part of stack exchange forum to ask such a question or it is better to ask in English language part?
For example, if you want to know whether the word is appropriate to describe an activity on an English CV, Academia is more likely to give you answers from the perspective you are interested in.
If you are however interested how those words are perceived by native speakers of English (that are not necessarily academics), you will get a better answer on English Language & Usage or English Language Learners. For example, you cannot expect answers on this site to elaborate on such terms as researcher of the occult.
Either way, I would not consider this question off-topic on Academia, but providing more context and asking it on the site fitting your context will help you to obtain better answers.