turbulency vs riptide

turbulency and riptide both are nouns.

Word	Noun	Adjective	Verb	Adverb
turbulency	Yes	No	No	No
riptide	Yes	No	No	No

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

turbulency: unstable flow of a liquid or gas
riptide: a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current

Other hyponyms of turbulency include countercurrent, crosscurrent, rip, tide rip.

turbulency (noun)	riptide (noun)
unstable flow of a liquid or gas	a strong surface current flowing outwards from a shore
	a stretch of turbulent water in a river or the sea caused by one current flowing into or across another current