come in vs throw in

come in and throw in both are verbs.

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

As verbs, come in and throw in are synonyms defined as:

Other synonyms of come in include inject, interject, interpose, put in.

come in (verb)	throw in (verb)
take a place in a competition; often followed by an ordinal	to insert between other elements
to insert between other elements	give up in the face of defeat of lacking hope; admit defeat
be received	add as an extra or as a gratuity
to come or go into
come into fashion; become fashionable