scurvy vs scummy

scurvy is a noun but scummy is not a noun.

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

As adjectives, scurvy and scummy are synonyms defined as:

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

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

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