chant vs cantillate

chant is a noun but cantillate is not a noun.

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

As verbs, chant and cantillate are synonyms defined as:

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

Other synonyms of chant include intonate, intone.

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

chant (verb)	cantillate (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