cur vs caitiff

cur and caitiff both are nouns.

Word	Noun	Adjective	Verb	Adverb
cur	Yes	No	No	No
caitiff	Yes	Yes	No	No

As nouns, caitiff is a hyponym of cur; that is, caitiff is a word with a more specific, narrower meaning than cur:

cur (noun)	caitiff (noun)
an inferior dog or one of mixed breed	a cowardly and despicable person
a cowardly or contemptible person

cur (adjective)	caitiff (adjective)
	despicably mean and cowardly