wastebin vs trash bin

wastebin and trash bin both are nouns.

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

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

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

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