different between needler vs needer

English

needle +? -er

needler (plural needlers)

Agent noun of needle; one who needles; an annoyer.
One who makes or uses needles.
A dealer in needles.
(Can we find and add a quotation of Piers Plowman to this entry?)
(chiefly science fiction) A gun that fires needles or darts.

From the verb need +? -er.

needer (plural needers)

A person who requires or needs something.
- 1975. Sport diver manual, by Jeppesen Sanderson, Inc.
  The needer is physically and mentally handicapped because of his immediate need for air... The donor takes a big breath and gives his mouthpiece to the needer.
- 2006. Emergent information technologies and enabling policies for counter terrorism, by Robert L. Popp, John Yen. P.241
  The difference between requestor and needer has been incorporated in current business practices.

Corruption of neither.

needer (not comparable)

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