ice, frost

cryophobia

ideas

ideophobia

ignored (being)

athazagoraphobia

illness, disease

pathophobia

immobility (of a joint)

ankylophobia

imperfection

atelophobia

infection

molysomophobia

infinity

apeirophobia

injections

trypanophobia

injury (physical)

traumatophobia (see also war)

insanity

lyssophobia (see also madness)

insects

entomophobia

insect stings

cnidophobia

itching or of the insects that cause itching

acarophobia