cross question vs cross-questioner

cross question is not a noun while cross-questioner is a noun.

Word	Noun	Adjective	Verb	Adverb
cross question	No	No	Yes	No
cross-questioner	Yes	No	No	No

cross question (noun)	cross-questioner (noun)
	someone who questions a witness carefully (especially about testimony given earlier)

cross question (verb)	cross-questioner (verb)
question closely, or question a witness that has already been questioned by the opposing side