infix vs insert

infix and insert both are nouns.

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

As verbs, infix and insert are synonyms defined as:

Other synonyms of infix include enter, introduce.

infix (noun)	insert (noun)
an affix that is inserted inside the word	(film) a still picture that is introduced and that interrupts the action of a film
	(broadcasting) a local announcement inserted into a network program
	an artifact that is inserted or is to be inserted
	a folded section placed between the leaves of another publication

infix (verb)	insert (verb)
attach a morpheme into a stem word	place, fit, or thrust (something) into another thing
put or introduce into something	insert casually
	put or introduce into something
	fit snugly into