spinal fluid vs body fluid

spinal fluid and body fluid both are nouns.

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

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

spinal fluid: clear liquid produced in the ventricles of the brain; fills and protects cavities in the brain and spinal cord
body fluid: the liquid parts of the body

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

spinal fluid (noun)	body fluid (noun)
clear liquid produced in the ventricles of the brain; fills and protects cavities in the brain and spinal cord	the liquid parts of the body