assistant vs helper

assistant and helper both are nouns.

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

As nouns, assistant and helper are synonyms defined as:

assistant and helper: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other synonyms of assistant include help, supporter.

assistant (noun)	helper (noun)
a person who contributes to the fulfillment of a need or furtherance of an effort or purpose	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

assistant (adjective)	helper (adjective)
of or relating to a person who is subordinate to another