inborn reflex vs physiological reaction

inborn reflex and physiological reaction both are nouns.

Word	Noun	Adjective	Verb	Adverb
inborn reflex	Yes	No	No	No
physiological reaction	Yes	No	No	No

As nouns, inborn reflex and physiological reaction are synonyms defined as:

inborn reflex and physiological reaction: an automatic instinctive unlearned reaction to a stimulus

inborn reflex (noun)	physiological reaction (noun)
an automatic instinctive unlearned reaction to a stimulus	an automatic instinctive unlearned reaction to a stimulus