fed up vs disgusted

fed up and disgusted both are adjectives.

Word	Noun	Adjective	Verb	Adverb
fed up	No	Yes	No	No
disgusted	No	Yes	No	No

As adjectives, fed up and disgusted are synonyms defined as:

Other synonyms of fed up include sick, sick of, tired of.

fed up (adjective)	disgusted (adjective)
having a strong distaste from surfeit	having a strong distaste from surfeit