KEY: Halcyon.
SYN: Calm, serene, balmy, unruffled.
ANT: Stormy, troublous, tempestuous, blustering, boisterous.

• Incomparable
• Incompassionate
• Incompatible, [See COMPATIBLE]
• Incompetence, [See COMPETENCE]
• Incompetent, [See ADEQUATE]
• Incomplete, [See COMPLETE]
• Incomprehensible
• Incomprehension, [See COMPREHENSION]
• Incompressible, [See COMPRESS]
• Inconceivable, [See CONCEIVE]
• Inconcinnity
• Inconclusive, [See CONCLUSIVE]
• Incongruous, [See CONGRUOUS]
• Inconsiderable, [See CONSIDERABLE]
• Inconsiderate, [See CONSIDERATE]
• Inconsistent, [See CONSISTENT]
• Inconsolable
• Inconsonant, [See CONSONANT]
• Inconstant
• Incontestable
• Incontiguous, [See ADJACENT_and_CONTERMINOUS]
• Incontinently, [See INCONTINENT]
• Incontinent, [See CONTINENCE]
• Incontrovertible, [See CONTROVERTIBLE]
• Inconvenience \v