Register Domains
Use this Domain Search by Keyword Tool to look up the availability of multiple domain names, simultaneously, based on a list of keywords/phrases without having to do extensive editing. You can use the Google External Keyword Tool to find keywords related to your business. Copy keywords from the search list (no need to remove spaces) and paste them into this form (one keyword/phrase per line), check the domain extensions you want to research, and click the "Check Availability" button to begin.
Limit keywords researched to a maximum of 10 (not including hyphenated versions if using that option) at a time to avoid DNS services from banning your IP address. The keywords/phrases should be limited to a maximum length of less than 30 characters to eliminate spamming the form with gibberish. You probably wouldn't want a domain name longer than 30 characters anyway.