summit vs brow

summit and brow both are nouns.

Word	Noun	Adjective	Verb	Adverb
summit	Yes	No	Yes	No
brow	Yes	No	No	No

As nouns, brow is a hyponym of summit; that is, brow is a word with a more specific, narrower meaning than summit:

Other hyponyms of summit include hilltop, pinnacle, mountain peak.

summit (noun)	brow (noun)
a meeting of heads of governments	the part of the face above the eyes
the top or extreme point of something (usually a mountain or hill)	the arch of hair above each eye
the highest level or degree attainable; the highest stage of development	the peak of a hill

summit (verb)	brow (verb)
reach the summit (of a mountain)