round top vs canvas

round top and canvas both are nouns.

Word	Noun	Adjective	Verb	Adverb
round top	Yes	No	No	No
canvas	Yes	No	Yes	No

As nouns, canvas is a hypernym of round top; that is, canvas is a word with a broader meaning than round top:

Other hypernyms of round top include canvas tent, canvass.

round top (noun)	canvas (noun)
a canvas tent to house the audience at a circus performance	a heavy, closely woven fabric
	the mat that forms the floor of the ring in which boxers or professional wrestlers compete
	a tent made of canvas fabric
	a large piece of fabric (usually canvas fabric) by means of which wind is used to propel a sailing vessel
	an oil painting on canvas fabric
	the setting for a narrative or fictional or dramatic account

round top (verb)	canvas (verb)
	cover with canvas