trash barrel vs ashcan

trash barrel and ashcan both are nouns.

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

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

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

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