helper vs conferrer

helper and conferrer both are nouns.

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

As nouns, conferrer is a hyponym of helper; that is, conferrer is a word with a more specific, narrower meaning than helper:

helper: a person who helps people or institutions (especially with financial help)
conferrer: person who makes a gift of property

helper (noun)	conferrer (noun)
a person who helps people or institutions (especially with financial help)	person who makes a gift of property
a person who contributes to the fulfillment of a need or furtherance of an effort or purpose	someone who converses or confers (as in a conference)