shell out vs roll out

shell out is not a noun while roll out is a noun.

Word	Noun	Adjective	Verb	Adverb
shell out	No	No	Yes	No
roll out	Yes	No	Yes	No

As verbs, roll out is a hyponym of shell out; that is, roll out is a word with a more specific, narrower meaning than shell out:

Other hyponyms of shell out include allot, assign, portion, reallot, deal, apply, give.

shell out (noun)	roll out (noun)
	the act of officially distributing a new product or service to the public

shell out (verb)	roll out (verb)
administer or bestow, as in small portions	flatten or spread with a roller
	straighten by unrolling
	to distribute systematically or strategically
	officially distribute a new product or service to the public