ashcan vs trash barrel

ashcan and trash barrel both are nouns.

Word	Noun	Adjective	Verb	Adverb
ashcan	Yes	No	No	No
trash barrel	Yes	No	No	No

As nouns, ashcan and trash barrel are synonyms defined as:

Other synonyms of ashcan include ash-bin, ash bin, ashbin, dustbin, garbage can, trash bin, trash can, wastebin.

ashcan (noun)	trash barrel (noun)
a bin that holds rubbish until it is collected	a bin that holds rubbish until it is collected