intonation vs intonate

intonation is a noun but intonate is not a noun.

Word	Noun	Adjective	Verb	Adverb
intonation	Yes	No	No	No
intonate	No	No	Yes	No

intonation (noun)	intonate (noun)
the act of singing in a monotonous tone
singing by a soloist of the opening piece of plainsong
the production of musical tones (by voice or instrument); especially the exactitude of the pitch relations
rise and fall of the voice pitch

intonation (verb)	intonate (verb)
	recite with musical intonation; recite as a chant or a psalm
	speak carefully, as with rising and falling pitch or in a particular tone