trundle vs trundle bed

trundle and trundle bed both are nouns.

Word	Noun	Adjective	Verb	Adverb
trundle	Yes	No	Yes	No
trundle bed	Yes	No	No	No

As nouns, trundle and trundle bed are synonyms defined as:

Other synonyms of trundle include truckle, truckle bed.

trundle (noun)	trundle bed (noun)
small wheel or roller	a low bed to be slid under a higher bed
a low bed to be slid under a higher bed

trundle (verb)	trundle bed (verb)
move heavily