3.
pneumonoultramicroscopicsilicovolcanoconiosis
5.
supercalifragilisticexpialidocious
6.
floccinaucinihilipilification
8.
antidisestablishmentarianism
9.
hippopotomonstrosesquippedaliophobia
10.
pseudopseudohypoparathyroidism
11.
honorificabilitudinitatibus
12.
thyroparathyroidectomized