perilymph vs body fluid

perilymph and body fluid both are nouns.

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

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

perilymph: the bodily fluid that fills the space between the bony labyrinth and the membranous labyrinth of the inner ear
body fluid: the liquid parts of the body

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

perilymph (noun)	body fluid (noun)
the bodily fluid that fills the space between the bony labyrinth and the membranous labyrinth of the inner ear	the liquid parts of the body