cat's-paw vs helper

cat's-paw and helper both are nouns.

Word	Noun	Adjective	Verb	Adverb
cat's-paw	Yes	No	No	No
helper	Yes	No	No	No

As nouns, helper is a hypernym of cat's-paw; that is, helper is a word with a broader meaning than cat's-paw:

cat's-paw: a person used by another to gain an end
helper: a person who contributes to the fulfillment of a need or furtherance of an effort or purpose

Other hypernyms of cat's-paw include assistant, help, supporter.

cat's-paw (noun)	helper (noun)
a hitch in the middle of rope that has two eyes into which tackle can be hooked	a person who helps people or institutions (especially with financial help)
a person used by another to gain an end	a person who contributes to the fulfillment of a need or furtherance of an effort or purpose