trash bin vs ash bin

trash bin and ash bin both are nouns.

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

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

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

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