accomplice vs helper

accomplice and helper both are nouns.

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

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

accomplice: a person who joins with another in carrying out some plan (especially an unethical or illegal plan)
helper: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other hypernyms of accomplice include assistant, help, supporter.

accomplice (noun)	helper (noun)
a person who joins with another in carrying out some plan (especially an unethical or illegal plan)	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