add vs throw in

add and throw in both are verbs.

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

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

Other hyponyms of add include factor, instill, transfuse, tinsel.

add (verb)	throw in (verb)
make an addition (to); join or combine or unite with others; increase the quality, quantity, size or scope of	to insert between other elements
make an addition by combining numbers	give up in the face of defeat of lacking hope; admit defeat
determine the sum of	add as an extra or as a gratuity
state or say further
bestow a quality on
constitute an addition