oxidiser vs oxidizing agent

oxidiser and oxidizing agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
oxidiser	Yes	No	No	No
oxidizing agent	Yes	No	No	No

As nouns, oxidiser and oxidizing agent are synonyms defined as:

oxidiser and oxidizing agent: a substance that oxidizes another substance

Other synonyms of oxidiser include oxidant, oxidizer.

oxidiser (noun)	oxidizing agent (noun)
a substance that oxidizes another substance	a substance that oxidizes another substance