protoactinium /prō-tō-ak-tinˈi-əm/ (chem)

• non-soluble
• non-specialist
• non-specific
• non-specific immunity
• non-specific urethritis
• non-standard
• non-standard salt-foot
• non-starter
• non-starters
• non-stick
• non-stop
• nonsuch
• nonsuches
• nonsuit
• nonsuited
• nonsuiting
• nonsuits
• non-swimmer
• non-swimmers
• non-technical
• non-term
• non-terms
• non-thing
• non-things
• non-toxic