add vs stick in

add and stick in both are verbs.

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

As verbs, stick in is a hyponym of add; that is, stick in is a word with a more specific, narrower meaning than add:

Other hyponyms of add include insert, slip in, sneak in, toss in.

add (verb)	stick in (verb)
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of	place, fit, or thrust (something) into another thing
make an addition by combining numbers	insert casually
determine the sum of
state or say further
bestow a quality on
constitute an addition