startle vs inborn reflex

startle and inborn reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
startle	Yes	No	Yes	No
inborn reflex	Yes	No	No	No

As nouns, inborn reflex is a hypernym of startle; that is, inborn reflex is a word with a broader meaning than startle:

startle (noun)	inborn reflex (noun)
a sudden involuntary movement	an automatic instinctive unlearned reaction to a stimulus

startle (verb)	inborn reflex (verb)
to stimulate to action
move or jump suddenly, as if in surprise or alarm