freewheel vs coast

freewheel and coast both are nouns.

Word	Noun	Adjective	Verb	Adverb
freewheel	Yes	No	Yes	No
coast	Yes	No	Yes	No

As verbs, coast is a hypernym of freewheel; that is, coast is a word with a broader meaning than freewheel:

freewheel (noun)	coast (noun)
a clutch (as on the rear wheel of a bicycle) that allows wheels to turn freely (as in coasting)	the act of moving smoothly along a surface while remaining in contact with it
	the area within view
	the shore of a sea or ocean
	a slope down which sleds may coast

freewheel (verb)	coast (verb)
coast in a vehicle using the freewheel	move effortlessly; by force of gravity
live unhurriedly, irresponsibly, or freely