brood vs procreate

brood is a noun but procreate is not a noun.

Word	Noun	Adjective	Verb	Adverb
brood	Yes	No	Yes	No
procreate	No	No	Yes	No

As verbs, procreate is a hypernym of brood; that is, procreate is a word with a broader meaning than brood:

brood: sit on (eggs)
procreate: have offspring or produce more individuals of a given animal or plant

Other hypernyms of brood include multiply, reproduce.

brood (noun)	procreate (noun)
the young of an animal cared for at one time

brood (verb)	procreate (verb)
sit on (eggs)	have offspring or produce more individuals of a given animal or plant
think moodily or anxiously about something
be in a huff; be silent or sullen
be in a huff and display one's displeasure
hang over, as of something threatening, dark, or menacing