Adjectives starting with ITier One Tier Two Tier Three

icy ideal impending

its impenetrable

identical imperial

impermeable

idle implacable

ignorant inaugural

ignored incandescent

ill incorrigible

illegal

illiterate incredulous

indecipherable

illustrated indentured

indigenous

imaginable indispensable

imaginary innovative

immediate interpersonal

immense

immortal intertidal

immune

impassable intimate

impatient intracellular

important intrusive

imposed irascible

impossible iridescent

impressed ironic

impressive irrevocable

improper

improvised

inaccessible

inadequate

inclined

incompatible

incredible

indebted

independent

Indian

indifferent

individual

industrial

industrious

inevitable

inexpensive

inexperienced

infamous

infected

infectious

inferior

infested

infinite

inflatable

influential

informal

informational

informative

informed

inherited

inhospitable

initial

injured

inner

innocent

inorganic

inquiring

inseparable

insignificant

inspiring

insulated

intact

intelligent

intense

intensive

intent

interactive

interconnected

interdependent

interesting

interior

intermediate

internal

international

interstellar

intimidated

intolerable

intricate

intrigued

invaluable

invasive

invigorated

invisible

involuntary

inward

irrational

irresistible

irresponsible

irreversible

isolated