keynote vs thought

keynote and thought both are nouns.

Word	Noun	Adjective	Verb	Adverb
keynote	Yes	No	Yes	No
thought	Yes	No	No	No

As nouns, thought is a hypernym of keynote; that is, thought is a word with a broader meaning than keynote:

Other hypernyms of keynote include idea.

keynote (noun)	thought (noun)
a fundamental or central idea	the process of using your mind to consider something carefully
(music) the first note of a diatonic scale	the content of cognition; the main thing you are thinking about
the principal theme in a speech or literary work	the organized beliefs of a period or group or individual
	a personal belief or judgment that is not founded on proof or certainty

keynote (verb)	thought (verb)
set the keynote of
give the keynote address to (an audience)