lactation vs body process

lactation and body process both are nouns.

Word	Noun	Adjective	Verb	Adverb
lactation	Yes	No	No	No
body process	Yes	No	No	No

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

Other hypernyms of lactation include activity, bodily function, bodily process.

lactation (noun)	body process (noun)
feeding an infant by giving suck at the breast	an organic process that takes place in the body
the production and secretion of milk by the mammary glands
the period following birth during which milk is secreted