felon (n.)
- abscess
- betrayer
- blain
- bleb
- blister
- boil
- bubo
- bulla
- bunion
- canker
- carbuncle
- chancre
- chancroid
- chilblain
- convict
- criminal
- crook
- culprit
- deceiver
- delinquent
- desperado
- double-dealer
- eschar
- evildoer
- fester
- festering
- fistula
- fugitive
- furuncle
- gangster
- gaolbird
- gathering
- gumboil
- jailbird
- kibe
- lawbreaker
- lesion
- malefactor
- malfeasant
- miscreant
- mobster
- offender
- outlaw
- papule
- paronychia
- petechia
- piles
- pimple
- pock
- polyp
- pustule
- quisling
- racketeer
- rising
- scab
- scofflaw
- sinner
- sore
- stigma
- sty
- suppuration
- swelling
- swindler
- traitor
- transgressor
- tubercle
- two-timer
- ulcer
- ulceration
- villain
- wale
- welt
- wheal
- whelk
- whitlow
- wound
- wrongdoer