semen vs body fluid

semen and body fluid both are nouns.

Word	Noun	Adjective	Verb	Adverb
semen	Yes	No	No	No
body fluid	Yes	No	No	No

As nouns, body fluid is a hypernym of semen; that is, body fluid is a word with a broader meaning than semen:

semen: the thick white fluid containing spermatozoa that is ejaculated by the male genital tract
body fluid: the liquid parts of the body

Other hypernyms of semen include bodily fluid, humor, humour, liquid body substance.

semen (noun)	body fluid (noun)
the thick white fluid containing spermatozoa that is ejaculated by the male genital tract	the liquid parts of the body