throw in vs inject

throw in and inject both are verbs.

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

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

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

throw in (verb)	inject (verb)
to insert between other elements	give an injection to
give up in the face of defeat of lacking hope; admit defeat	to introduce (a new aspect or element)
add as an extra or as a gratuity	to insert between other elements
	feed intravenously
	take by injection
	force or drive (a fluid or gas) into by piercing