The Longest Words In English List

The longest words in the English language tend to be dominated by medical terms, which are rarely said in their entirety by doctors, and instead shortened to something more manageable!

The longest English word in the world is “neumonoultramicroscopicsilicovolcanoconiosis” (often shortened to silicosis) which is a lung disease caused by the inhalation of very fine silica dust. Silica is a component of many types of rocks and soils, and is commonly found in industries such as mining, quarrying, and sandblasting.

Subscribe to our mailing list to receive FREE exclusive content and offers!

When silica particles are inhaled, they can become lodged in the lungs and cause inflammation and scarring. This can lead to difficulty breathing, cough, and other respiratory symptoms.

The 100 Longest Words In English

pneumonoultramicroscopicsilicovolcanoconiosis
dichlorodiphenyltrichloroethane
cyclotrimethylenetrinitramine
trinitrophenylmethylnitramine
hydroxydehydrocorticosterone
antidisestablishmentarianism
electroencephalographically
hydroxydesoxycorticosterone
microspectrophotometrically
microspectrophotometrical
immunoelectrophoretically
philosophicopsychological
superincomprehensibleness
regeneratoryregeneratress
electroencephalographical
demethylchlortetracycline
antidisestablishmentarian
electrocardiographically
disestablishmentarianism
diphenylaminechlorarsine
formaldehydesulphoxylate
pathologicopsychological
microelectrophoretically
magnetothermoelectricity
preobtrudingpreobtrusion
pseudointernationalistic
tetraiodophenolphthalein
thyroparathyroidectomize
scientificophilosophical
scientificogeographical
thymolsulphonephthalein
transubstantiationalist
pseudolamellibranchiata
pseudolamellibranchiate
pseudophilanthropically
preinferredpreinferring
polytetrafluoroethylene
formaldehydesulphoxylic
anthropomorphologically
chlorotrifluoroethylene
dichlorodifluoromethane
dihdroxycholecalciferol
desoxyribonucleoprotein
blepharosphincterectomy
disestablismentarianism
electroencephalographic
electrophotomicrography
epididymodeferentectomy
macracanthrorhynchiasis
magnetohydrodynamically
microspectrophotometric
pathologicohistological
phenolsulphonephthalein
philosophicotheological
pericardiomediastinitis
gastroenteroanastomosis
hematospectrophotometer
overindividualistically
overintellectualization
pancreaticoduodenostomy
pancreaticogastrostomy
omnirepresentativeness
overimpressionableness
overrepresentativeness
photochronographically
photospectroheliograph
pyopneumocholecystitis
phenylethylmalonylurea
philosophicohistorical
pneumohydropericardium
pneumoventriculography
polioencephalomyelitis
microcryptocrystalline
microelectrophoretical
microspectrophotometer
microspectrophotometry
naphthylaminesulphonic
noncontemporaneousness
nondistinguishableness
noninterchangeableness
nonrepresentationalism
hexahydroxycyclohexane
hexamethylenetetramine
hexanitrodiphenylamine
laparocolpohysterotomy
lymphangioendothelioma
hydropneumopericardium
hyperconscientiousness
hyperconstitutionalism
historicocabbalistical
interdenominationalism
prorhipidoglossomorpha
pseudoaristocratically
pseudoenthusiastically
pseudomonocotyledonous
snailfishessnailflower
spectrophotometrically
stereophotomicrography
sternocleidomastoideus
succinylsulphathiazole

Share or print this page:


More Word Lists


Spotted an error on this page? Please let us know! errors@word-lists.com.