tough guy (n.)
- beast
- beldam
- berserk
- berserker
- bomber
- brute
- bully
- bullyboy
- colossus
- demon
- devil
- dragon
- fiend
- fire-eater
- firebrand
- fury
- giant
- goon
- gorilla
- hellcat
- hellhound
- hellion
- hood
- hoodlum
- hothead
- hotspur
- incendiary
- killer
- madcap
- monster
- mugger
- powerhouse
- rapist
- revolutionary
- savage
- spitfire
- stalwart
- termagant
- terror
- terrorist
- tiger
- tigress
- tough
- virago
- vixen
- witch
- wolf