ingestion vs body process

ingestion and body process both are nouns.

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

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

ingestion: the process of taking food into the body through the mouth (as by eating)
body process: an organic process that takes place in the body

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

ingestion (noun)	body process (noun)
the process of taking food into the body through the mouth (as by eating)	an organic process that takes place in the body