raffle off vs raffle

raffle off is not a noun while raffle is a noun.

Word	Noun	Adjective	Verb	Adverb
raffle off	No	No	Yes	No
raffle	Yes	No	Yes	No

As verbs, raffle off and raffle are synonyms defined as:

raffle off (noun)	raffle (noun)
	a lottery in which the prizes are goods rather than money

raffle off (verb)	raffle (verb)
dispose of in a lottery	dispose of in a lottery