route vs crest

route and crest both are nouns.

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

route (noun)	crest (noun)
an open way (generally public) for travel or transportation	a showy growth of e.g. feathers or skin on the head of a bird or other animal
an established line of travel or access	(heraldry) in medieval times, an emblem used to decorate a helmet
	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)

route (verb)	crest (verb)
send via a specific route	reach a high point
divert in a specified direction	lie at the top of
send documents or materials to appropriate destinations