counterpart /kownˈtər-pärt/

1. The part that answers to, fits into or completes another part, having the qualities which the other lacks
2. A corresponding or equivalent person or thing
3. A duplicate, a close or exact copy

• off one's face
• off one's feed
• off one's game
• off one's guard
• off one's hands
• off one's head
• off one's nut
• off one's oats
• off one's onion
• off one's own bat
• off one's rocker
• off one's stroke
• off one's trolley
• off pat
• off-peak
• offpeak
• off-piste
• off-plan
• offprint
• offprints
• offput
• offputs
• off-putter
• off-putters
• off-putting