1. Not radioactive

Antonym: radioactive

• arsenide
• arsenious
• arsenite
• arsenopyrite
• arsenous anhydride
• arsenous oxide
• arsey
• arsine
• arsis
• arson
• arsonist
• art
• art class
• art collection
• art critic
• art dealer
• art deco
• art department
• art director
• art editor
• art exhibition
• art film
• art form
• art gallery
• art historian