scummy vs scurvy

scummy is not a noun while scurvy is a noun.

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

As adjectives, scummy and scurvy are synonyms defined as:

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

scummy (noun)	scurvy (noun)
	a condition caused by deficiency of ascorbic acid (vitamin C)

scummy (adjective)	scurvy (adjective)
of the most contemptible kind	of the most contemptible kind
covered with scum