hang glider vs sailplane

hang glider and sailplane both are nouns.

Word	Noun	Adjective	Verb	Adverb
hang glider	Yes	No	No	No
sailplane	Yes	No	Yes	No

As nouns, sailplane is a hypernym of hang glider; that is, sailplane is a word with a broader meaning than hang glider:

hang glider: a glider resembling a large kite; the rider hangs from it while descending from a height
sailplane: aircraft supported only by the dynamic action of air against its surfaces

Other hypernyms of hang glider include glider.

hang glider (noun)	sailplane (noun)
a glider resembling a large kite; the rider hangs from it while descending from a height	aircraft supported only by the dynamic action of air against its surfaces
a rider of a hang glider

hang glider (verb)	sailplane (verb)
	fly a plane without an engine