wastebasket vs waste basket

wastebasket and waste basket both are nouns.

Word	Noun	Adjective	Verb	Adverb
wastebasket	Yes	No	No	No
waste basket	Yes	No	No	No

As nouns, wastebasket and waste basket are synonyms defined as:

wastebasket and waste basket: a container with an open top; for discarded paper and other rubbish

Other synonyms of wastebasket include circular file, waste-paper basket, wastepaper basket.

wastebasket (noun)	waste basket (noun)
a container with an open top; for discarded paper and other rubbish	a container with an open top; for discarded paper and other rubbish