1.
Pneumonoultramicroscopicsilicovolcanoconiosis
2.
Hippopotomonstrosesquippedaliophobia
3.
supercalifragilisticexpialidocious
4.
Eellogofusciouhipoppokunurious
5.
Pseudopseudohypoparathyroidism
6.
Floccinaucinihilipilification
7.
Hexakosioihexekontahexaphobia
8.
Antidisestablishmentarianism
9.
Spectrophotofluorometrically
10.
Honorificabilitudinitatibus
11.
Psychoneuroendocrinological
12.
Laryngotracheobronchitis
13.
Hydrochlorofluorocarbons
14.
Microspectrophotometries
15.
Dichlorodifluoromethane
16.
Pancreaticoduodenectomy
17.
Subcompartmentalization
18.
Counterrevolutionaries
19.
Deinstitutionalization
20.
Electroencephalography
21.
Thyroparathyroidectomy