scummy vs abject

scummy and abject both are adjectives.

Word	Noun	Adjective	Verb	Adverb
scummy	No	Yes	No	No
abject	No	Yes	No	No

As adjectives, scummy and abject are synonyms defined as:

Other synonyms of scummy include low-down, low, miserable, scurvy.

scummy (adjective)	abject (adjective)
of the most contemptible kind	of the most contemptible kind
covered with scum	showing utter resignation or hopelessness
	showing humiliation or submissiveness
	most unfortunate or miserable