I just started my luck with domaineering a few days ago. No, domaineering is something that I think you will not find in a dictionary because it's a new term made up by some group of people in that industry.
Domaineering is the business of buying and selling domains for a profit. The domains you buy does not necessarily have to be developed. All you need to produce is a catchy domain which you may 'hand reg' (register using domain registrars) or 'catch' (buy domains that have expired and weren't renewed by their past owners) or buy from some other domainer for investment.
I thought that thinking of a good name is not as easy as I thought. Possibly every one-word generic names are gone because they are considered 'premiums' and are in the 5- and 6-digit figures. An example would be flowers.mobi which was sold for $200K.
You may earn money out of this industry not just by choosing a generic name that attracts 'type-on' traffic. Another way is to purchase names that are considered 'brandable' and 'catchy'. This is where creativity kicks in. Choose a good name, sell it to an end-user (someone who will keep it for good and develop it), and you have it. More cash. One trend that I noticed is the addition of i's in front of the name. You'll see domains like iBloopers and iSee all over. I guess this is the product of rise to fame of the iPhone, the iPod, and its accessories.
It isn't also as simple as I thought. There are terms like 'premium letters', 'LLL', '5L', and you have to familiarize yourself with the top level domain (like .com and .net) and the current market trends. I guess any money making venture is an art that you will have to master if you want to make profit.
Do you have a creative domain name in mind? Register it now before someone else grabs it.