quilt vs patchwork

quilt and patchwork both are nouns.

Word	Noun	Adjective	Verb	Adverb
quilt	Yes	No	Yes	No
patchwork	Yes	No	No	No

As nouns, patchwork is a hyponym of quilt; that is, patchwork is a word with a more specific, narrower meaning than quilt:

quilt: bedding made of two layers of cloth filled with stuffing and stitched together
patchwork: a quilt made by sewing patches of different materials together

Other hyponyms of quilt include continental quilt, duvet, eiderdown, patchwork quilt.

quilt (noun)	patchwork (noun)
bedding made of two layers of cloth filled with stuffing and stitched together	sewing consisting of pieces of different materials sewn together in a pattern
	a quilt made by sewing patches of different materials together
	a theory or argument made up of miscellaneous or incongruous ideas

quilt (verb)	patchwork (verb)
create by stitching together
stitch or sew together