Floccinaucinihilipilification: To describe something worthless.

Pneumonoultramicroscopicsilicovolcanoconiosis: It is a factitious word alleged to mean ‘a lung disease caused by the inhalation of very fine silica dust, causing inflammation in the lungs.’

Honorificabilitudinitatibus: This was coined by Shakespeare which means ‘the state of being able to achieve honors’.

Antidisestablishmentarianism: This is the longest non-coined and non-technical English word which was found in 19th to oppose the ‘disestablishment of the Church of England as the state church of England’.