secretion vs salivation

secretion and salivation both are nouns.

Word	Noun	Adjective	Verb	Adverb
secretion	Yes	No	No	No
salivation	Yes	No	No	No

As nouns, salivation is a hyponym of secretion; that is, salivation is a word with a more specific, narrower meaning than secretion:

Other hyponyms of secretion include galactosis, hypersecretion.

secretion (noun)	salivation (noun)
a functionally specialized substance (especially one that is not a waste) released from a gland or cell	the secretion of saliva
the organic process of synthesizing and releasing some substance