Domai.nr is free domain name suggestion service packaging old wine in a new bottle. Unlike other domain name search sites, domai.nr suggests non TLD domains in addition to common ones like .com, .net, .org, etc. top level domains.
So if you are looking for a domain name resembling some other domain that has already been registered then domain.nr can be a good start for you.
Go to domai.nr and put down your reference domain name in search box
within few seconds you would see suggestions for search term you entered, with domain names under top level and non top level ones.
Now from this suggestion list, domain name entries with green bullets are yet to be registered, those without green bullets are already registered and one with white-green bullet can be or cannot be registered – status is unknown.