brood vs dwell

brood is a noun but dwell is not a noun.

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

As verbs, brood and dwell are synonyms defined as:

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

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