1. Immediately; without delay.

2. Immediately; eagerly.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• instsntly,
• instintly,
• instantley,
• insantly,
• instanty,
• canstantly,
• instantce,
• instantally,
• instanity,
• ocnstantly,
• instandly,
• instinctly,
• instantlt,
• instantm,
• instintaly,
• instatly,
• instantatly,
• instuently,
• instantaly,
• instatnly

• installing,
• constantly,
• instability,
• instance,
• instinctual,
• instil,
• instal,
• inkstand,
• instauration,
• instant,
• instead,
• instantiate,
• instalment,
• instar,
• installment,
• install,
• incessantly,
• in-situ,
• inmost,
• instinctive,
• In situ,
• incitation,
• instinct,
• instancy,
• inositol,
• instigant,
• intently.

The adjective form of the word "instantly" is "instant".