search vs rout up

search is a noun but rout up is not a noun.

Word	Noun	Adjective	Verb	Adverb
search	Yes	No	Yes	No
rout up	No	No	Yes	No

search (noun)	rout up (noun)
the activity of looking thoroughly in order to find something or someone
boarding and inspecting a ship on the high seas
an investigation seeking answers
the examination of alternative hypotheses
an operation that determines whether one or more of a set of items has a specified property

search (verb)	rout up (verb)
inquire into	get or find by searching
try to locate or discover, or try to establish the existence of
subject to a search
search or seek