Kainophobia - Fear of anything new, novelty.

Kakorrhaphiophobia - Fear of failure or defeat.

Katagelophobia - Fear of ridicule.

Kathisophobia - Fear of sitting down.

Kenophobia - Fear of voids or empty spaces.

Keraunophobia - Fear of thunder and lightning.

Kinesophobia - Fear of movement or motion.

Kinetophobia - Fear of movement or motion.

Kleptophobia - Fear of stealing.

Koinoniphobia - Fear of rooms.

Kolpophobia - Fear of genitals, particularly female.

Kopophobia - Fear of fatigue.

Koniophobia - Fear of dust.

Kosmikophobia - Fear of cosmic phenomenon.

Kymophobia - Fear of waves.

Kynophobia - Fear of rabies.

Kyphophobia - Fear of stooping.