disreputable vs reputation

disreputable is not a noun while reputation is a noun.

Word	Noun	Adjective	Verb	Adverb
disreputable	No	Yes	No	No
reputation	Yes	No	No	No

disreputable (noun)	reputation (noun)
	the general estimation that the public has for a person
	the state of being held in high esteem and honor
	notoriety for some particular characteristic

disreputable (adjective)	reputation (adjective)
lacking respectability in character or behavior or appearance