powder monkey vs helper

powder monkey and helper both are nouns.

Word	Noun	Adjective	Verb	Adverb
powder monkey	Yes	No	No	No
helper	Yes	No	No	No

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

powder monkey: someone who carries explosives (as from the magazine to the guns on board a warship)
helper: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other hypernyms of powder monkey include assistant, help, supporter.

powder monkey (noun)	helper (noun)
someone who carries explosives (as from the magazine to the guns on board a warship)	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