anbout two words

Hi,guys.

Glad to know you here. I have a question to ask you ,anyone who kind enough to tell me ? thanks in advance!

one is "Demonym ", it is a word existed in the introuduction of our motherland--China.
another one is "tildes", It is a word appeared in the "how to use wikipedia asking questions"
I can't find the word in the dictionary and internet .
please explain it to me ,thanks for your time .

B/R

Lucida

tranlation two word He wrote a two-thousand-word report yesterday. he is writing a two thousand word article.中word为什么是单数形式 He never said a word the whole two hours.这里为什么加the 脑筋急转弯：Which word becomes smaller when you add two letters to it? I'd like to say a word or two _ his proposal.请帮忙解答 There is a word of five words.If you take away two letters,only one remains.What is the word? 重庆TWO TWO Life is a leaf of paper white,thereon each of us may write his word or two . two coffee,two tea,two cake对不对？