arch·ri·val 
(ärchrīvəl)
(ärchrīvəl)n.
A principal rival.
- sportswoman
- sportswriter
- sportswriting
- sport utility vehicle
- sporty
- sporulate
- sporulation
- spot
- spot check
- spot-check
- spotless
- spotlessly
- spotlessness
- spotlight
- spot-on
- spot pass
- spot price
- Spotsylvania
- spottable
- spotted
- spotted cranesbill
- spotted fever
- spotted geranium
- spotted owl
- spotted salamander