vitreous humour vs body fluid

vitreous humour and body fluid both are nouns.

Word	Noun	Adjective	Verb	Adverb
vitreous humour	Yes	No	No	No
body fluid	Yes	No	No	No

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

vitreous humour: the clear colorless transparent jelly that fills the posterior chamber of the eyeball
body fluid: the liquid parts of the body

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

vitreous humour (noun)	body fluid (noun)
the clear colorless transparent jelly that fills the posterior chamber of the eyeball	the liquid parts of the body