A List of Phobias Beginning with 'I'

Iatrophobia

Fear of going to the doctor or of doctors.

Ichthyophobia

Fear of fish.

Ideophobia

Fear of ideas.

Illyngophobia

Fear of vertigo or feeling dizzy when looking down.

Insectophobia

Fear of insects.

Iophobia

Fear of poison.

Isolophobia

Fear of solitude, being alone.

Isopterophobia

Fear of termites, insects that eat wood.

Ithyphallophobia

Fear of seeing, thinking about or having an erect penis.