These are the words in Webster's Third New International Dictionary that were formed by the misdivision of older words (such as newt, which came from an ewt). Some are familiar, some are not.

• accomplice
• adder[1,noun]
• agio
• aitchbone
• apron[1,noun]
• auger[1,noun]
• aught[7,noun]
• auncel
• aventail
• broil[1,verb]
• cunette
• dab[6,noun]
• dupe[1,noun]
• emony
• est
• ettle[3,noun]
• ewest
• eyas
• guglia
• haberdine
• ingot
• lamantin
• lierre
• lone
• nain
• naunt
• newt
• nickname[1,noun]
• nidget
• ningle
• nonce[1,noun]
• nope[1,noun]
• notch[1,noun]
• nother[1,pronoun]
• nother[2,adjective]
• nuncle
• ouch[1,noun]
• ounce[2,noun]
• pigsney
• prele
• rouse[3,noun]
• tone[1,pronoun]
• tother[1,pronoun]
• tother[2,adjective]
• umpire[1,noun]
• willie-waught
• wis