water nymph vs water sprite

water nymph and water sprite both are nouns.

Word	Noun	Adjective	Verb	Adverb
water nymph	Yes	No	No	No
water sprite	Yes	No	No	No

As nouns, water nymph and water sprite are synonyms defined as:

Other synonyms of water nymph include water spirit.

water nymph (noun)	water sprite (noun)
(Greek mythology) any nymph of the water	a fairy that inhabits water
a fairy that inhabits water	aquatic fern of tropical America often used in aquariums
submerged aquatic plant having narrow leaves and small flowers; of fresh or brackish water
a water lily having large leaves and showy fragrant flowers that float on the water; of temperate and tropical regions