A domain name can infringe an existing trademark resulting in a domain name dispute.
Domain name disputes arise in several ways
Identical Names from Different Industries. Identical trademarks from different industries can co-exist. However, only one company can use the name or trademark as a domain name within the same top level domain. Even though both Delta Air Lines and the Delta Faucet Company have trademark rights in the word Delta, www.delta.com belongs to Delta Air Lines.
Cybersquatting. Cybersquatting is the registration of a domain name ...