cross-file vs slate

cross-file is not a noun while slate is a noun.

Word	Noun	Adjective	Verb	Adverb
cross-file	No	No	Yes	No
slate	Yes	No	Yes	No

As verbs, slate is a hyponym of cross-file; that is, slate is a word with a more specific, narrower meaning than cross-file:

cross-file (noun)	slate (noun)
	(formerly) a writing tablet made of slate
	a list of candidates nominated by a political party to run for election to public offices
	a fine-grained metamorphic rock that can be split into thin layers
	thin layers of rock used for roofing

cross-file (verb)	slate (verb)
have one's name listed as a candidate for several parties	designate or schedule
	cover with slate
	enter on a list or slate for an election