insert vs foist

insert is a noun but foist is not a noun.

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

As verbs, foist is a hyponym of insert; that is, foist is a word with a more specific, narrower meaning than insert:

insert (noun)	foist (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)	foist (verb)
place, fit, or thrust (something) into another thing	insert surreptitiously or without warrant
insert casually	to force onto another
put or introduce into something
fit snugly into