sneeze vs reflex

sneeze and reflex both are nouns.

Word	Noun	Adjective	Verb	Adverb
sneeze	Yes	No	Yes	No
reflex	Yes	Yes	No	No

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

sneeze: a symptom consisting of the involuntary expulsion of air from the nose
reflex: an automatic instinctive unlearned reaction to a stimulus

sneeze (noun)	reflex (noun)
a symptom consisting of the involuntary expulsion of air from the nose	an automatic instinctive unlearned reaction to a stimulus

sneeze (adjective)	reflex (adjective)
	without volition or conscious control

sneeze (verb)	reflex (verb)
exhale spasmodically, as when an irritant entered one's nose