inlet vs. intake

inoculation vs. vaccination

interbreeding vs. miscegenation

intercourse vs. relation

integrating vs. integration

instruction vs. teaching

instruction vs. pedagogy

instruction vs. statement

inspection vs. review

inculcation vs. ingraining

inculcation vs. instilling

imaging vs. tomography

imagination vs. imaging

imagery vs. imaging

industry vs. manufacture

incarnation vs. personification

insurgence vs. insurgency

intifada vs. intifadah

infiltration vs. percolation

intelligence vs. news

intelligence vs. word

intelligence vs. tidings

insurrection vs. uprising

itemisation vs. itemization

inventory vs. inventorying

inventory vs. stocktaking

inventory vs. stock

iteration vs. looping

iteration vs. loop

itemization vs. listing

interjection vs. interposition

interpolation vs. interposition

interpellation vs. interposition

inhabitancy vs. inhabitation

inunction vs. unction

idolisation vs. idolization

issue vs. issuing

issuance vs. issue

issue vs. publication

issue vs. matter

issue vs. number

issue vs. offspring

issue vs. progeny

issue vs. return

issue vs. release

issue vs. supply

idleness vs. idling

idleness vs. loafing

inactiveness vs. inactivity

inactivity vs. inertia

inaction vs. inactivity

importation vs. importing

import vs. importation

immobilisation vs. immobilization

immobilization vs. immobilizing

imprisonment vs. incarceration

immurement vs. imprisonment

impoverishment vs. pauperization

impoverishment vs. poorness

impoverishment vs. poverty

internationalisation vs. internationalization

insubordination vs. rebelliousness

indorsement vs. sanction

indorsement vs. secondment

idealisation vs. idealization

insistence vs. insistency

insistence vs. insisting

insistence vs. press

insistency vs. press

intermediation vs. mediation

impertinence vs. insolence

impudence vs. insolence

involvement vs. participation

intimacy vs. involvement

involvement vs. liaison

incitation vs. incitement

incitation vs. provocation

incitement vs. provocation

insect vs. worm

indri vs. indris

impasse vs. standstill

impasse vs. stalemate

icon vs. image

ikon vs. image

image vs. picture

image vs. persona

image vs. prototype

image vs. paradigm

image vs. range

incumbrance vs. load

integrator vs. planimeter

interface vs. port

ice vs. sparkler

indicant vs. indicator

index vs. indicator

internet vs. net

icon vs. ikon

inductance vs. inductor

inflater vs. inflator

idol vs. perfection

infrastructure vs. substructure

igloo vs. iglu

iodoform vs. triiodomethane

inhalator vs. inhaler

imbrication vs. overlapping

imbrication vs. lapping

inhalator vs. respirator

inkstand vs. inkwell

input vs. stimulation

input vs. remark

impedimenta vs. obstruction

implant vs. plant

innersole vs. insole

import vs. moment

import vs. significance

implication vs. import

import vs. meaning

import vs. signification

import vs. importee

import vs. spell

inlet vs. recess

iceboat vs. scooter

igniter vs. lighter

ignitor vs. lighter

illumination vs. miniature

illuminance vs. illumination

illumination vs. light

impediment vs. obstruction

inkpad vs. pad

incline vs. ramp

incline vs. side

incline vs. slope

incline vs. pitch

incline vs. run

icebox vs. refrigerator

impost vs. springer

iodin vs. iodine

identity vs. individuality

identicalness vs. identity

identity vs. indistinguishability

individualism vs. individuality

individuality vs. individuation

internality vs. inwardness

inwardness vs. substance

introversion vs. intussusception

introversion vs. invagination

infolding vs. introversion

indifference vs. nonchalance

indifference vs. unconcern

indifference vs. unemotionality

irritability vs. temper

irritability vs. peevishness

irritability vs. petulance

indolence vs. laziness

impatience vs. restlessness

impertinence vs. pertness

impertinence vs. impudence

impishness vs. mischievousness

inclemency vs. severity

inclemency vs. inclementness

inanition vs. lethargy

inanition vs. slackness

inanition vs. lassitude

involuntariness vs. unwillingness

irresponsibility vs. irresponsibleness

impetuosity vs. impetuousness

incaution vs. incautiousness

inadvertence vs. unmindfulness

inadvertence vs. oversight

inadvertency vs. unmindfulness

inflexibility vs. rigidity

inflexibility vs. rigidness

inflexibility vs. inflexibleness

inconvenience vs. troublesomeness

incommodiousness vs. inconvenience

incommode vs. inconvenience

inconvenience vs. trouble

indistinctness vs. softness

incompatibility vs. inconsistency

incompatibility vs. repugnance

incongruity vs. incongruousness

irony vs. sarcasm

irony vs. satire

invariability vs. invariance

invariableness vs. invariance

ingeniousness vs. ingenuity

ingenuity vs. inventiveness

impressiveness vs. magnificence

immutability vs. immutableness

incurability vs. incurableness

ineptness vs. unsuitability

inappositeness vs. inaptness

inappropriateness vs. unworthiness

inappropriateness vs. wrongness

inaccessibility vs. unavailability

inopportuneness vs. untimeliness

isomorphism vs. isomorphy

indefiniteness vs. indeterminateness