seethe vs hum

seethe is not a noun while hum is a noun.

Word	Noun	Adjective	Verb	Adverb
seethe	No	No	Yes	No
hum	Yes	No	Yes	No

As verbs, seethe and hum are synonyms defined as:

Other synonyms of seethe include buzz.

seethe (noun)	hum (noun)
	a humming noise
	the state of being or appearing to be actively engaged in an activity

seethe (verb)	hum (verb)
boil vigorously	sing with closed lips
foam as if boiling	make a low continuous sound
be in an agitated emotional state	sound with a monotonous hum
be noisy with activity	be noisy with activity