KEY: Casual.
SYN: Accidental, occasional, incidental, contingent, unforeseen,fortuitous.
ANT: Regular, ordinary, systematic, periodic, certain, fixed, [SeeCASUALTY].

• Impudent
• Impugn
• Impulse
• Impulsive
• Impure
• Impute
• Inability, [See ABILITY]
• Inaccessible, [See ACCESSIBLE]
• Inaccurate, [See ACCURATE]
• Inaction, [See ACTION]
• Inactive
• Inactivity, [See ACTIVITY]
• Inadequate, [See ADEQUATE]
• Inadmissible, [See ADMISSIBLE]
• Inadvertence
• Inadvertent
• Inalienable
• Inane
• Inanimate, [See ANIMATE]
• Inanition
• Inanity
• Inappetency, [See APPETITE]
• Inapplicable, [See APPLICABLE]
• Inapposite, [See APPOSITE]
• Inappreciable