About dashes or hyphens in domain names

General advice:

Do not use dashes or numbers in your domain name- it is hard for people to remember, unless it is central to the theme of your site.

If you own a domain without hyphen and which consists of two words, you should register also the domain with hyphen.

Worst case: A competitor has the domain with hyphen.

Otherwise you will lose traffic, as a part of consumers will type your domain with hyphen into the browser.

Hans-Peter Oswald

http://www.domainregistry.de/com-domain/