coverlet vs counterpane

coverlet and counterpane both are nouns.

Word	Noun	Adjective	Verb	Adverb
coverlet	Yes	No	No	No
counterpane	Yes	No	No	No

As nouns, counterpane is a hypernym of coverlet; that is, counterpane is a word with a broader meaning than coverlet:

Other hypernyms of coverlet include bed cover, bed covering, bedcover, bedspread, spread.

coverlet (noun)	counterpane (noun)
a decorative bedspread (usually quilted)	decorative cover for a bed