coast vs freewheel

coast and freewheel both are nouns.

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

As verbs, freewheel is a hyponym of coast; that is, freewheel is a word with a more specific, narrower meaning than coast:

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

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