offerer vs helper

offerer and helper both are nouns.

Word	Noun	Adjective	Verb	Adverb
offerer	Yes	No	No	No
helper	Yes	No	No	No

As nouns, helper is a hypernym of offerer; that is, helper is a word with a broader meaning than offerer:

offerer: someone who presents something to another for acceptance or rejection
helper: a person who helps people or institutions (especially with financial help)

Other hypernyms of offerer include benefactor.

offerer (noun)	helper (noun)
someone who presents something to another for acceptance or rejection	a person who helps people or institutions (especially with financial help)
	a person who contributes to the fulfillment of a need or furtherance of an effort or purpose