chant vs speak

chant is a noun but speak is not a noun.

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

As verbs, speak is a hypernym of chant; that is, speak is a word with a broader meaning than chant:

Other hypernyms of chant include mouth, talk, utter, verbalise, verbalize.

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

chant (verb)	speak (verb)
recite with musical intonation; recite as a chant or a psalm	express in speech
utter monotonously and repetitively and rhythmically	exchange thoughts; talk with
	use language
	give a speech to
	make a characteristic or natural sound