KEY: Supererogation.
SYN: Superfluity, excess, superabundance, supervacaneousness,needlessness.
ANT: Necessity, unprofitableness, duty, shortcoming, deficiency.

• Irritate
• Irritation, [See IRRITATE]
• Irruption
• Isolate
• Isolation
• Issue
• {[ItEolst]?}
• Iteration
• Itinerant
• Jade
• Jangle
• Jangle \v
• Jar
• Jargon
• Jaundiced
• Jauty, or_Jaunty
• Jealous
• Jealousy
• Jeer
• Jejune
• Jeopardy
• Jest
• Jilt
• Jingle
• {[Jnn-H*lfole]?}, [See FEASIBLE]