1. Not radioactive

Antonym: radioactive

• sucking pig
• suckle
• suckled
• suckling
• suckling pig
• suckling reflex
• sucralfate
• sucrase
• sucre
• sucrose
• suction
• suction cup
• suction curettage
• suction lipectomy
• suction pump
• suction stop
• suctorial
• Sudafed
• Sudan
• Sudanese
• Sudanese monetary unit
• Sudanese pound
• sudate
• sudation
• sudatorium