sailing vs parasailing

sailing and parasailing both are nouns.

Word	Noun	Adjective	Verb	Adverb
sailing	Yes	No	No	No
parasailing	Yes	No	No	No

As nouns, parasailing is a hyponym of sailing; that is, parasailing is a word with a more specific, narrower meaning than sailing:

Other hyponyms of sailing include hang gliding, paragliding.

sailing (noun)	parasailing (noun)
riding in a sailboat	gliding in a parasail
the work of a sailor
the departure of a vessel from a port
the activity of flying a glider