Synonyms of the word

sidesplitting

• adj. (of laughter) Intensely uncontrollable and genuine.
• adj. Exceptionally funny; hilarious.

humorous

• adj. Full of humor or arousing laughter; funny.
• adj. Showing humor; witty, jocular.
• adj. (obsolete) Damp or watery.
• adj. (obsolete) Dependent on or caused by one's humour or mood; capricious, whimsical.

humourous

• adj. (chiefly Britain, uncommon, nonstandard) Alternative spelling of humorous.

killing

• v. present participle of kill.
• adj. That literally deprives of life; lethal, deadly, fatal.
• adj. Devastatingly attractive.
• adj. That makes one ‘die’ with laughter; very funny.
• n. An instance of someone being killed.
• n. (informal) A large amount of money.