From The Readers Digest Online:
Aulophobia: Fear of flutes
Arachibutyrophobia: Fear of peanut butter sticking to the roof of the mouth
Geliophobia: Fear of laughter
Genuphobia: Fear of knees
Hippopotomonstrosesquippedaliophobia: Fear of long words
Linonophobia: Fear of string
Metrophobia: Fear of poetry
Xanthophobia: Fear of the color yellow
Phobophobia: Fear of fear
-- http://laughs.rd.com/clean-jokes-and-laughs/10-phobias-youve-never-heard-of/article188715.html?epid#&trkid=LAUGH09F3-1