chant vs intonate

chant is a noun but intonate is not a noun.

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

As verbs, chant and intonate are synonyms defined as:

chant and intonate: recite with musical intonation; recite as a chant or a psalm

Other synonyms of chant include cantillate, intone.

chant (noun)	intonate (noun)
a repetitive song in which as many syllables as necessary are assigned to a single tone

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