insert vs stick in

insert is a noun but stick in is not a noun.

Word	Noun	Adjective	Verb	Adverb
insert	Yes	No	Yes	No
stick in	No	No	Yes	No

As verbs, insert and stick in are synonyms defined as:

insert and stick in: place, fit, or thrust (something) into another thing

Other synonyms of insert include enclose, inclose, introduce, put in.

As verbs, insert and stick in are synonyms defined as:

Other synonyms of insert include slip in, sneak in.

insert (noun)	stick in (noun)
(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

insert (verb)	stick in (verb)
place, fit, or thrust (something) into another thing	place, fit, or thrust (something) into another thing
insert casually	insert casually
put or introduce into something
fit snugly into