brim vs lip

brim and lip both are nouns.

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

As nouns, brim and lip are synonyms defined as:

Other synonyms of brim include rim.

brim (noun)	lip (noun)
a circular projection that sticks outward from the crown of a hat	either the outer margin or the inner margin of the aperture of a gastropod's shell
the top edge of a vessel or other container	the top edge of a vessel or other container
	either of two fleshy folds of tissue that surround the mouth and play a role in speaking
	an impudent or insolent rejoinder
	(botany) either of the two parts of a bilabiate corolla or calyx

brim (verb)	lip (verb)
fill as much as possible
be completely full