hypo vs autoinjector

hypo and autoinjector both are nouns.

Word	Noun	Adjective	Verb	Adverb
hypo	Yes	No	No	No
autoinjector	Yes	No	No	No

As nouns, autoinjector is a hyponym of hypo; that is, autoinjector is a word with a more specific, narrower meaning than hypo:

hypo: a piston syringe that is fitted with a hypodermic needle for giving injections
autoinjector: a hypodermic syringe to use in injecting yourself with a liquid

hypo (noun)	autoinjector (noun)
a piston syringe that is fitted with a hypodermic needle for giving injections	a hypodermic syringe to use in injecting yourself with a liquid
a compound used as a fixing agent in photographic developing