trash bin vs dustbin

trash bin and dustbin both are nouns.

Word	Noun	Adjective	Verb	Adverb
trash bin	Yes	No	No	No
dustbin	Yes	No	No	No

As nouns, trash bin and dustbin are synonyms defined as:

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

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