hydrogen peroxide vs oxidizer

hydrogen peroxide and oxidizer both are nouns.

Word	Noun	Adjective	Verb	Adverb
hydrogen peroxide	Yes	No	No	No
oxidizer	Yes	No	No	No

As nouns, oxidizer is a hypernym of hydrogen peroxide; that is, oxidizer is a word with a broader meaning than hydrogen peroxide:

hydrogen peroxide: a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels
oxidizer: a substance that oxidizes another substance

Other hypernyms of hydrogen peroxide include oxidant, oxidiser, oxidizing agent.

hydrogen peroxide (noun)	oxidizer (noun)
a viscous liquid with strong oxidizing properties; a powerful bleaching agent; also used (in aqueous solutions) as a mild disinfectant and (in strong concentrations) as an oxidant in rocket fuels	a substance that oxidizes another substance