syn- /sin-/, sy- /si-/, syl- /sil-/, sym- /sim-/ or sys- /sis-/

Signifying together, with

• benchership
• bencherships
• benches
• bench fees
• bench-hole
• bench-holes
• benching
• benchmark
• benchmarked
• benchmarking
• benchmarks
• bench press
• bench-press
• bench-pressed
• bench presses
• bench-presses
• bench-pressing
• bench test
• bench-test
• bench-tested
• bench-testing
• bench tests
• bench-tests
• bench-warmer
• bench-warmers