Historic vs Pr - What's the difference?
As an adjective historic
As a noun pr is
* historick (obsolete)
* hystoric (nonstandard)
Having importance or significance in history.
Belonging to the past; historical (see note below).
* The rule that "an" is used before vowel sounds is confounded by the wide variety in pronunciation (particularly regional) of the sometimes-silent h''. For example, in the United States, the ''h generally is not silent. (See s for more details.)
* Modern convention makes a distinction between historic''''' and '''''historical''''', although the two words are variants and have shared the same meanings for much of their history. '''''Historic''''' means "very important in history or having a long history", while '''''historical''''' refers to people who lived or events that occurred in the past, or refers to things that are connected with or found in the past. For example, a '''historic event''' is an important event of history, while a ' historical event is any event that happened in the past, whether important or not.
*: July 4, 1776 is a historic date. A great deal of historical research has been done on the events leading up to that day.
*: The historical works of Lord Macaulay and Edward Gibbon are in and of themselves historic.
Words @ Random
The American Heritage® Book of English Usage.
Paul Brians Common Errors in English Usage
The UVic Writer's Guide
Garbl's Writing Center
The ISO 3166-1 two-letter (alpha-2) code for Puerto Rico.