röntgen ray or roentgen raynoun

• synergic
• synergism
• synergist
• synergy
• synesthesia
• syngamy
• synod
• synodic
• synodical
• synodic month
• synonym
• synonymous
• synonymy
• synopsis
• synopsize
• synoptic
• synovia
• synovitis
• syntactic
• syntactics
• syntagm
• syntagma
• syntax
• synth
• synthesis