infix vs secure

infix is a noun but secure is not a noun.

Word	Noun	Adjective	Verb	Adverb
infix	Yes	No	Yes	No
secure	No	Yes	Yes	No

infix (noun)	secure (noun)
an affix that is inserted inside the word

infix (adjective)	secure (adjective)
	free from fear or doubt; easy in mind
	free from danger or risk
	not likely to fail or give way
	immune to attack; incapable of being tampered with
	financially safe

infix (verb)	secure (verb)
attach a morpheme into a stem word	make certain of
put or introduce into something	cause to be firmly attached
	fill or close tightly with or as if with a plug
	furnish with battens
	get by special effort
	assure payment of