dog sled vs sled

dog sled and sled both are nouns.

Word	Noun	Adjective	Verb	Adverb
dog sled	Yes	No	No	No
sled	Yes	No	Yes	No

As nouns, sled is a hypernym of dog sled; that is, sled is a word with a broader meaning than dog sled:

dog sled: a sled pulled by dogs
sled: a vehicle mounted on runners and pulled by horses or dogs; for transportation over snow

Other hypernyms of dog sled include sledge, sleigh.

dog sled (noun)	sled (noun)
a sled pulled by dogs	a vehicle mounted on runners and pulled by horses or dogs; for transportation over snow

dog sled (verb)	sled (verb)
	ride (on) a sled