blowup vs reflexion

blowup and reflexion both are nouns.

Word	Noun	Adjective	Verb	Adverb
blowup	Yes	No	No	No
reflexion	Yes	No	No	No

As nouns, reflexion is a hypernym of blowup; that is, reflexion is a word with a broader meaning than blowup:

Other hypernyms of blowup include expression, manifestation, reflection.

blowup (noun)	reflexion (noun)
a photographic print that has been enlarged	the image of something as reflected by a mirror (or other reflective material)
an unrestrained expression of emotion	the ability to reflect beams or rays
a violent release of energy caused by a chemical or nuclear reaction	a likeness in which left and right are reversed
	a calm, lengthy, intent consideration
	a remark expressing careful consideration
	expression without words
	the phenomenon of a propagating wave (light or sound) being thrown back from a surface