holdover vs hold over

holdover is a noun but hold over is not a noun.

Word	Noun	Adjective	Verb	Adverb
holdover	Yes	No	No	No
hold over	No	No	Yes	No

holdover (noun)	hold over (noun)
something that has survived from the past
an official who remains in office after his term

holdover (verb)	hold over (verb)
	intimidate somebody (with a threat)
	hold over goods to be sold for the next season
	keep in a position or state from an earlier period of time
	continue a term of office past the normal period of time
	hold back to a later time