critter or crittur /kritˈər/ (dialect and informal; now esp US)

1. A creature
2. An animal

• on drives
• on-drives
• on-driving
• on duty
• -one
• one
• one-acter
• one-acters
• one and all
• one-and-thirty
• one another
• one-armed bandit
• on earth
• one by one
• one day
• one-day
• on edge
• one-dimensional
• one-er
• one-eyed
• one fell swoop
• one flesh
• onefold
• one for his nob
• one for the road