Some Questions about English Language

What is the longest English word containing no letter more than once?
There are two 15-letter words that we know of: uncopyrightable and dermatoglyphics.

What comes after primary, secondary, tertiary?
The sequence continues with quaternary, quinary, senary, septenary, octonary, nonary, denary. Words also exist for `twelfth order' (duodenary) and `twentieth order' (vigenary).

What is the difference between a 'street' and a 'road'?
The terms may frequently apply to exactly the same thing. However, 'road' is a general term, whereas 'street' is narrower in sense and chiefly urban in application: a street typically has buildings on either side, and is paved or metalled.

What is the longest one-syllable English word?

The one most commonly cited is screeched (nine letters). However, one ought to mention also scratched, scrounged, scrunched, stretched, and the plural nouns straights and strengths (all with nine letters).

The complete Oxford English Dictionary also indicates the existence of scraughed, scrinched, scritched, scrooched, sprainged, spreathed, throughed, and thrutched.

The OED also cites a single instance of the ten-letter word scraunched, from the 1620 English translation of Don Quixote.

[via :www.askoxford.com]