What Are the Longest Words

Floccinaucinihilipilification (29 letters) … Antidisestablishmentarianism (28 letters) … Honorificabilitudinitatibus (27 letters) … Thyroparathyroidectomized (25 letters) … Dichlorodifluoromethane (23 letters) … Incomprehensibilities (21 letters)

Is there a word longer than Pneumonoultramicroscopicsilicovolcanoconiosis?

The longest words in the dictionary are: antidisestablishmentarianism – opposition to the disestablishment of the Church of England – 28 letters. floccinaucinihilipilification – the estimation of something as worthless – 29 letters. pneumonoultramicroscopicsilicovolcanoconiosis – a supposed lung disease – 45 letters.

What is the longest word that takes 3 hours?

Pneumonoultramicroscopicsilicovolcanoconiosis (45 letters)