incomparable vs. uncomparable

incomprehensive vs. noncomprehensive

imperturbable vs. unflappable

incomprehensible vs. uncomprehensible

incomprehensible vs. inexplicable

indecipherable vs. unclear

indeterminate vs. undetermined

immaterial vs. indifferent

indifferent vs. unbiased

indifferent vs. unbiassed

isolated vs. obscure

isolated vs. stray

isolated vs. quarantined

isolated vs. marooned

isolated vs. stranded

impregnable vs. inexpugnable

indomitable vs. unsubduable

insuperable vs. insurmountable

insuperable vs. unconquerable

insurmountable vs. unsurmountable

invincible vs. unbeatable

invincible vs. unvanquishable

innocent vs. innocuous

ingenuous vs. innocent

impeccant vs. innocent

innocent vs. sinless

innocent vs. unacquainted

insensible vs. unaffected

insensible vs. senseless

indiscernible vs. insensible

insensible vs. undetectable

inharmonious vs. unharmonious

ironic vs. ironical

ironic vs. wry

incontestable vs. incontestible

incontrovertible vs. positive

illative vs. inferential

inarguable vs. unarguable

insistent vs. repetitive

insistent vs. instant

irregular vs. unpredictable

irregular vs. maverick

irregular vs. unorthodox

irregular vs. temporary

irregular vs. second

inconspicuous vs. invisible

invisible vs. unseeable

indistinguishable vs. undistinguishable

irrepressible vs. uncontrollable

immaterial vs. nonmaterial

immaterial vs. incorporeal

immaterial vs. metaphysical

intangible vs. nonphysical

insubstantiality vs. intangible

impalpable vs. intangible

incarnate vs. substantiate

incorrupt vs. incorrupt

interactive vs. synergistic

interactional vs. interactive

insular vs. parochial

inconsiderate vs. unconsidered

insubstantial vs. unsubstantial

insubstantial vs. unreal

insubstantial vs. jejune

inquisitive vs. speculative

inquisitive vs. questioning

inquisitive vs. wondering

incumbent vs. officeholder

imaginative vs. inventive

incredible vs. unbelievable

improbable vs. marvelous

improbable vs. marvellous

improbable vs. tall

improbable vs. unlikely

improbable vs. unconvincing

important vs. significant

insubordinate vs. resistant

interrogative vs. interrogatory

interrogative vs. question

interrogation vs. interrogative

indefinable vs. undefinable

indefinable vs. unutterable

indecorous vs. indelicate

indecent vs. indecorous

indecorous vs. untoward

indecorous vs. unbecoming

indecorous vs. uncomely

indecorous vs. unseemly

immodest vs. indecent

infernal vs. satanic

infernal vs. unholy

inst vs. instant

instant vs. second

instant vs. wink

instant vs. instantaneous

irrefutable vs. positive

implicative vs. suggestive

interdependent vs. mutualist

independent vs. main

independent vs. sovereign

independent vs. mugwump

indestructible vs. undestroyable

indestructible vs. perdurable

imposing vs. stately

impoverished vs. needy

indiscriminating vs. undiscriminating

inebriated vs. intoxicated

inchoate vs. incipient

incisive vs. sharp

impressive vs. telling

ineffectual vs. unable

ineffectual vs. otiose

inedible vs. uneatable

ignorant vs. illiterate

ignorant vs. nescient

ignorant vs. unlearned

ignorant vs. unlettered

ignorant vs. unwitting

illiterate vs. nonreader

indefatigable vs. unflagging

isochronal vs. isochronous

isoclinal vs. isoclinic

inessential vs. unessential

inessential vs. nonessential

imbalanced vs. unbalanced

inquiring vs. questioning

indelible vs. unerasable

inexpungeable vs. inexpungible

inexterminable vs. inextirpable

inquisitory vs. searching

ingratiating vs. insinuating

ingratiating vs. ingratiatory

inculpative vs. inculpatory

inoffensive vs. unoffending

irredeemable vs. unreformable

inexhaustible vs. unlimited

intoxicant vs. intoxicating

incapacitate vs. invalid

inequitable vs. unjust

inexpedient vs. unwise

internal vs. national

internal vs. intragroup

intrinsic vs. intrinsical

inmost vs. innermost

inexperienced vs. inexperient

inexpressible vs. unexpressible

indescribable vs. unutterable

ineffable vs. unutterable

inextensible vs. nonextensile

insurgent vs. seditious

insurgent vs. subversive

insurgent vs. insurrectionist

insurgent vs. rebel

inerrable vs. inerrant

inerrable vs. unerring

indulgent vs. soft

impermanent vs. temporary

inaugural vs. inauguration

infelicitous vs. unhappy

infertile vs. sterile

intermediate vs. medium

intermediate vs. mediate

inflexible vs. sturdy

inflexible vs. rigid

inflexible vs. unbending

inborn vs. innate

informal vs. loose

inodorous vs. odorless

icy vs. polar

imitative vs. onomatopoeic

imitative vs. onomatopoeical

imitative vs. onomatopoetic

immature vs. unfledged

immature vs. young

irritable vs. nettlesome

infective vs. morbific

infective vs. pathogenic

infectious vs. infective

insidious vs. pernicious

insidious vs. subtle

inebriant vs. intoxicant

innocuous vs. unobjectionable

inhomogeneous vs. nonuniform

ingrowing vs. ingrown

icteric vs. yellow

intumescent vs. puffy

implemental vs. subservient

instrumental vs. subservient

indissoluble vs. insoluble

institutionalised vs. institutionalized

inimical vs. unfriendly

igneous vs. pyrogenic

imperfect vs. weak

imperfect vs. progressive

inconsequent vs. inconsequential

industrialised vs. industrialized

inflowing vs. influent

inpour vs. inpouring

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