reputation vs disreputable

reputation is a noun but disreputable is not a noun.

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

reputation (noun)	disreputable (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

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