'Dreamt' is the only English word that ends in the letters 'mt'.

'Stewardesses' is the longest word that can be typed with only the left hand. 

'Underground' is the only word in the English language that begins and ends with the letters 'und.' 

A pregnant goldfish is called a twit. 

Cats have over one hundred vocal sounds, while dogs only have about ten. 

Donald Duck's middle name is Fauntleroy. 

Facetious and abstemious contain all the vowels in the correct order, as does arsenious,
meaning 'containing arsenic.' 

Los Angeles's full name is 'El Pueblo de Nuestra Senora la Reina de los Angeles de
Porciuncula' and can be abbreviated to 3.63% of its size,'L.A.' 

The combination 'ough' can be pronounced in nine different ways. The following sentence contains them all: 'A rough-coated, dough-faced, thoughtful ploughman strode through the
streets of Scarborough; after falling into a slough, he coughed and hiccoughed.'

The dot over the letter 'i' is called a tittle.

The letters KGB stand for Komitet Gosudarstvennoy Bezopasnosti.

The longest one-syllable word in the English language is 'screeched.' 

The longest place-name still in use

Traumatawhakatangihangakoauauotamateaturipukakapikimaungahoronukupokaiwenakitnatahu, a New Zealand hill. 

The longest word in the English language, according to the Oxford English Dictionary, is pneumonoultramicroscopicsilicovolcanoconiosis; The only other word with the same amount of letters is pneumonoultramicroscopicsilicovolcanoconioses, its plural. 

The only 15 letter word that can be spelled without repeating a letter is uncopyrightable. 

The symbol on the 'pound' key (#) is called an octothorpe. 

The word 'Checkmate' in chess comes from the Persian phrase 'Shah Mat,' which means 'the king is dead.' 

The word 'set' has more definitions than any other word in the English language. 

There are only four words in the English language which end in'-dous': tremendous, horrendous, stupendous, and hazardous. 

There is a seven letter word in the English language that contains ten words without rearranging any of its letters, 'therein': the, there, he, in, rein, her, here, ere, therein, herein.