What's the difference between felt and felter?

Felt

Definition:

(imp. & p. p.) of Feel
() imp. & p. p. / a. from Feel.
(n.) A cloth or stuff made of matted fibers of wool, or wool and fur, fulled or wrought into a compact substance by rolling and pressure, with lees or size, without spinning or weaving.
(n.) A hat made of felt.
(n.) A skin or hide; a fell; a pelt.
(v. t.) To make into felt, or a feltike substance; to cause to adhere and mat together.
(v. t.) To cover with, or as with, felt; as, to felt the cylinder of a steam emgine.

Example Sentences:

(1) I'm not sure Tolstoy ever worked out how he actually felt about love and desire, or how he should feel about it.
(2) I remember talking to an investment banker about what it felt like in the City before the closure of Lehman Brothers.
(3) I felt a much stronger connection with the kids on my home block, who I rode bikes with nightly.
(4) There were 54 patients who had a family doctor, 38 felt he could assist in aftercare.
(5) It is felt that otologic surgery should be done before the pinna reconstruction as it is very important to try and introduce sound into these children at an early age.
(6) It felt like my very existence was being denied,” said Hahn Chae-yoon, executive director of Beyond the Rainbow Foundation.
(7) Polls indicated that anger over the government shutdown, which was sharply felt in parts of northern Virginia, as well as discomfort with Cuccinelli's deeply conservative views, handed the race to McAuliffe, a controversial Democratic fundraiser and close ally of Bill and Hillary Clinton.
(8) If we’re waiting around for the Democratic version to sail through here, or the Republican version to sail through here, all those victims who are waiting for us to do something will wait for days, months, years, forever and we won’t get anything done.” Senator Bill Nelson, whose home state of Florida is still reeling from the Orlando shooting, said he felt morally obligated to return to his constituents with results.
(9) I think of tattoos as art, but also, every time I look at mine, I relive the emotions I felt when I had them.
(10) Chadwick felt that Customs and Trading Standards needed to continue their war on illegal tobacco – if not, efforts to tackle smoking could be undermined.
(11) "I felt so relaxed today, I wasn't bouncing off the walls ready to race.
(12) The Cambridge-based couple felt ignored when tried to raise the alarm about the way their business – publisher Zenith – was treated by Lynden Scourfield, the former HBOS banker jailed last week, and David Mills’ Quayside Corporate Services.
(13) I personally felt grateful that British TV set itself apart from its international rivals in this way, not afraid to challenge, to stretch the mind and imagination.
(14) The percentage of those who felt they had successful results decreased with time: 82.8% felt their knees had improved immediately after postoperative rehabilitation; this decreased to 78.1% at 6 months, 73.5% at 1 year, 65.5% at 2 years, and 50.0% at 3 years.
(15) It is deeply moving hearing him talk now – as if from the grave – about a Christmas Day when he felt so frustrated and cut-off from his family that he had to go into the office to escape.
(16) The local MP, Rory Stewart, a mover and shaker on the broadband project, told me that he was desperate to get telehealth into Cumbria, but regretfully felt that it was not immediately doable, because the local council and healthcare community did not yet have the necessary expertise.
(17) We felt that this relatively high redislocation rate was due to failure to immobilize these shoulders for 3 weeks postoperatively.
(18) Last year, statistics showed that 95% of recipients felt more confident after getting a hearing dog.
(19) I felt like he was a little bit inexperienced and the race got away from him a little bit at the third-last.
(20) It is felt that the use of quinidine was causally related to the development of nephrotic syndrome in this patient.