flowerbed vs flower bed

flowerbed and flower bed both are nouns.

Word	Noun	Adjective	Verb	Adverb
flowerbed	Yes	No	No	No
flower bed	Yes	No	No	No

As nouns, flowerbed and flower bed are synonyms defined as:

Other synonyms of flowerbed include bed of flowers.

flowerbed (noun)	flower bed (noun)
a bed in which flowers are growing	a bed in which flowers are growing