quilt vs eiderdown

quilt and eiderdown both are nouns.

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

As nouns, eiderdown is a hyponym of quilt; that is, eiderdown 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
eiderdown: a soft quilt usually filled with the down of the eider

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

quilt (noun)	eiderdown (noun)
bedding made of two layers of cloth filled with stuffing and stitched together	down of the eider duck
	a soft quilt usually filled with the down of the eider

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