bedcover
Synonym discussion
Sense: noun/1
For sense 1, bedcover is a general word for the top cloth layer that makes a bed look finished. Bedspread is often almost the same word, especially in North American English, and may be the more familiar choice in stores. Coverlet usually suggests a lighter or more decorative layer and can sound slightly more traditional. Duvet is different: it is a thick stuffed cover used mainly for warmth, even if it also looks nice. So you can buy a patterned bedcover for a guest room, smooth a bedspread before visitors arrive, or pull a duvet over yourself on a cold night.
Etymology
Bedcover was formed in English by joining bed and cover. The parts are simple and literal: it originally named something that covers a bed, and later also came to mean the cloth layers on the bed in British use.