dustbin vs ashcan

dustbin and ashcan both are nouns.

Word	Noun	Adjective	Verb	Adverb
dustbin	Yes	No	No	No
ashcan	Yes	No	No	No

As nouns, dustbin and ashcan are synonyms defined as:

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

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