Keywords are words or short phrases that represent the main ideas in your research topic or question. To come up with keywords, identify the most important words in your research question or topic.
As you search for sources using the keywords, you will identify new keywords from abstracts, subject terms and titles. You can revise your searches with new keywords and continue the process until you find relevant sources.
Synonyms are great to use when searching in databases, because databases only bring back results which contain the exact words you typed in. If you don't include synonyms you could miss out on some relevant sources.
To find keywords and synonims you can use dictionaries or an thesaurus
Here you'll find some more interesting other LibGuides to check out.