rotter vs crumb

rotter and crumb both are nouns.

Word	Noun	Adjective	Verb	Adverb
rotter	Yes	No	No	No
crumb	Yes	No	Yes	No

As nouns, rotter and crumb are synonyms defined as:

rotter and crumb: a person who is deemed to be despicable or contemptible

Other synonyms of rotter include bum, dirty dog, git, lowlife, puke, rat, scum bag, scumbag, skunk, so-and-so, stinker, stinkpot.

rotter (noun)	crumb (noun)
a person who is deemed to be despicable or contemptible	small piece of e.g. bread or cake
	a person who is deemed to be despicable or contemptible
	a very small quantity of something