sperm cell vs spermatozoan

sperm cell and spermatozoan both are nouns.

Word	Noun	Adjective	Verb	Adverb
sperm cell	Yes	No	No	No
spermatozoan	Yes	No	No	No

As nouns, sperm cell and spermatozoan are synonyms defined as:

sperm cell and spermatozoan: the male reproductive cell; the male gamete

Other synonyms of sperm cell include sperm, spermatozoon.

sperm cell (noun)	spermatozoan (noun)
the male reproductive cell; the male gamete	the male reproductive cell; the male gamete