KEY: Archaic, [See ANCIENT].

• Intolerable, [See INSUFFERABLE]
• Intolerant, [See TOLERANT]
• Intomb
• Intonation
• Intoxication
• Intractable, [See TRACTABLE]
• Intransient, [See TRANSIENT]
• Intrenchment
• Intrepid
• Intricacy
• Intricate
• Intrigue
• Intrinsic
• Intrinsic, [See EXTRANEOUS]
• Introduce
• Introduction
• Introductory
• Introvert
• Intrude, [See INTERFERE]
• Intrusion, [See INTRUDE]
• Intuition
• Intuitive, [See INSTINCTIVE]
• Intumescence
• Inundate
• {[Inurbanltr]?}