rotten vs crappy

rotten and crappy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
rotten	No	Yes	No	No
crappy	No	Yes	No	No

As adjectives, rotten and crappy are synonyms defined as:

Other synonyms of rotten include icky, lousy, shitty, stinking, stinky.

rotten (adjective)	crappy (adjective)
having decayed or disintegrated; usually implies foulness	very bad
damaged by decay; hence unsound and useless
very bad