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

Signifying together, with

• electroliers
• electrologies
• electrology
• electroluminescence
• electroluminescent
• electrolyse
• electrolysed
• electrolyser
• electrolysers
• electrolyses
• electrolysing
• electrolysis
• electrolyte
• electrolytes
• electrolytic
• electrolytical
• electrolytically
• electrolyze
• electrolyzed
• electrolyzes
• electrolyzing
• electromagnet
• electromagnetic
• electromagnetically
• electromagnetic interaction