spermatozoan vs sperm cell

spermatozoan and sperm cell both are nouns.

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

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

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

Other synonyms of spermatozoan include sperm, spermatozoon.

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