brim vs fill

brim and fill both are nouns.

Word	Noun	Adjective	Verb	Adverb
brim	Yes	No	Yes	No
fill	Yes	No	Yes	No

As verbs, fill is a hypernym of brim; that is, fill is a word with a broader meaning than brim:

Other hypernyms of brim include fill up, make full.

brim (noun)	fill (noun)
a circular projection that sticks outward from the crown of a hat	a quantity sufficient to satisfy
the top edge of a vessel or other container	any material that fills a space or container

brim (verb)	fill (verb)
fill as much as possible	become full
be completely full	make full, also in a metaphorical sense
	plug with a substance
	fill to satisfaction
	eat until one is sated
	fill, satisfy or meet a want or need or condition or restriction
	assume, as of positions or roles
	appoint someone to (a position or a job)
	occupy the whole of