crest vs arms

crest and arms both are nouns.

Word	Noun	Adjective	Verb	Adverb
crest	Yes	No	Yes	No
arms	Yes	No	No	No

crest (noun)	arms (noun)
a showy growth of e.g. feathers or skin on the head of a bird or other animal	weapons considered collectively
(heraldry) in medieval times, an emblem used to decorate a helmet	the official symbols of a family, state, etc.
the center of a cambered road
the top line of a hill, mountain, or wave
the top or extreme point of something (usually a mountain or hill)

crest (verb)	arms (verb)
reach a high point
lie at the top of