keynote speech vs keynote

keynote speech and keynote both are nouns.

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

keynote speech (noun)	keynote (noun)
a speech setting forth the keynote	a fundamental or central idea
	(music) the first note of a diatonic scale
	the principal theme in a speech or literary work

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