trundle vs roller

trundle and roller both are nouns.

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

As nouns, roller is a hypernym of trundle; that is, roller is a word with a broader meaning than trundle:

Other hypernyms of trundle include wheel.

trundle (noun)	roller (noun)
small wheel or roller	a grounder that rolls along the infield
a low bed to be slid under a higher bed	Old World bird that tumbles or rolls in flight; related to kingfishers
	pigeon that executes backward somersaults in flight or on the ground
	a cylinder that revolves
	a mechanical device consisting of a cylindrical tube around which the hair is wound to curl it
	a small wheel without spokes (as on a roller skate)
	a long heavy sea wave as it advances towards the shore

trundle (verb)	roller (verb)
move heavily