dwell vs brood

dwell is not a noun while brood is a noun.

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

As verbs, dwell and brood are synonyms defined as:

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

dwell (verb)	brood (verb)
think moodily or anxiously about something	sit on (eggs)
come back to	think moodily or anxiously about something
be an inhabitant of or reside in	be in a huff; be silent or sullen
originate (in)	be in a huff and display one's displeasure
exist or be situated within	hang over, as of something threatening, dark, or menacing