injector vs inject

injector is a noun but inject is not a noun.

Word	Noun	Adjective	Verb	Adverb
injector	Yes	No	No	No
inject	No	No	Yes	No

injector (noun)	inject (noun)
a contrivance for injecting (e.g., water into the boiler of a steam engine or particles into an accelerator etc.)
An injector, ejector, steam ejector, steam injector, eductor-jet pump or thermocompressor is a type of pump.

injector (verb)	inject (verb)
	give an injection to
	to introduce (a new aspect or element)
	to insert between other elements
	feed intravenously
	take by injection
	force or drive (a fluid or gas) into by piercing