search vs rout out

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

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

search (noun)	rout out (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 out (verb)
inquire into	cause to flee
try to locate or discover, or try to establish the existence of	force or drive out
subject to a search	get or find by searching
search or seek