mongrel vs cur

mongrel and cur both are nouns.

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

As nouns, mongrel and cur are synonyms defined as:

Other synonyms of mongrel include mutt.

mongrel (noun)	cur (noun)
an inferior dog or one of mixed breed	an inferior dog or one of mixed breed
derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin	a cowardly or contemptible person