The longest English word which consists only of vowels is Euouae ****

A Void

Are you into reading books in English? Do you like playing with words or letters? If you do, you might be interested in reading a book called A Void by French writter Georges Perec. What is this book special for? Well, you won't find a letter E in the whole book. This style of writing is called „lipogram“. The novel has been translated into English by Gilbert Adair and also in his translation the letter E is omitted. Although one of the most common letters in English is left out, most of the readers say A Void is brilliantly written whodunit, thrilling and in its way mind-boggling.
(source: goodreads.com/bo­ok/show/28294­.A_Void)

French kiss

One English/French interesting fact: Did you know that what is called a „French kiss“ in the English speaking countries is known as an „English kiss“ in France? 

Source: world-english.org

rich English

From all the languages all over the world English has the richest vocabulary – it contains about 800 thousand words. Also there is no other language that has as many synonyms as English.

source: funshun.com – amazing-facts/language-facts

Dreamt

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

Source: transaralingo.com

Go.

The shortest complete sentence in the English language is = Go.

Re: Go.

Source : fun-with-english.co.uk

The most tongue twisting English tongue twister is this:
„The sixth sick sheikh's sixth sheep's sick.“
Source:improve­englishonline­.com

yes in scotland

Do you know how to say yes in Scottish English?
- AYE /ai/

this word is from Scots Gaelic, a Celtic language.
When you hear somebody to say this word, you can be sure you´re speaking to Scottish person (or somebody pretending to be Scottish person 

(wiki.answers­.com/Q/how_do_y­ou_say_the_wor­d_yes_in_scot­tish)

Chinese Pidgin English

Do you know that existed Chinese Pidgin English which was used between Chinese and British tradesmen in 18th century?

Encyclopedia Britannica

meaning

Two words „toxicant“ and „intoxicant“ have seemingly converse meaning.
(ojohaven.com/fun/tri­via.html)

indivisibility

Did you know that there is a word in the English language with only one vowel, which occurs five times: „indivisibility.“
Source: funshun.com/amazing-facts/language-facts.html

Re:

I forgot to write the source – en.wikipedia.

Did you know that that there are only 4 words in English that end in „duos“? Here they are: horrendous, tremendous, hazardous, stupendous.

(Source: funshun.com)

Compaund nouns

Nouns can be divided into three groups according to their word formation. Compound nouns are one of them. These words are formed from two and more simple nouns or another part of speech like a preposition or so one. A hash or gap is among these simple nouns or they are written together.
If a compound noun consists of one or more simple noun and ends in another part of speech like a preposition and a hash is among the words it consists from then, in my opinion, this word is very special. A special word like I described is an editor-in-chief, for example. These special words form plural by ending the -s or -es to the last noun to make singular into plural . So, we have a word an editor-in-chief it means an editor having final responsebility of a publication. Singular is an editor-in-chief and plural is editors-in-chief. The possesive case of these special words is usual, we add ‚s to the last word of the special word
Summary:
Yesterday I saw a famous editor-in-chief.
Editors-in-chief are very important persons.
Editor-in-chief‘s notes are very important, too.