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

Signifying together, with

• tercentenary
• tercentennial
• tercentennials
• terces
• tercet
• tercets
• tercio
• tercios
• terebene
• terebenes
• terebinth
• terebinthine
• terebinths
• terebra
• terebrae
• terebrant
• terebrants
• terebras
• terebrate
• terebrated
• terebrates
• terebrating
• terebration
• terebrations
• terebratula