Yes is the short answer, even though there can only be one primary domain name assigned to each website, but there is no limit to how many other domain names can be forwarded to the primary domain. In fact, the more domain names forwarded, potentially the more traffic that intentionally or unintentionally reaches your web page. Very rarely is there ever a single domain that is unique enough to stand alone. There are usually singular, plural, spelling, and word-sequence options to consider when creating domain names. Owning all of such variations provides for some sort of exclusivity in respect to your online identity.
Following any of your purchases of my domains, via GoDaddy or Afternic, please contact me per the contact information posted on commitsynergy.com. I will confirm such purchase(s) with either GoDaddy and/or Afternic and then I will coordinate with them on how I am to transfer any bonus domain names to you. Such transfers will occur only after your qualifying domain purchase(s) is/are finalized. You and I will directly coordinate the transferring of any registered LLC and/or Trade Name(s) after the qualifying transaction is complete.
The only domain names I would potentially consider selling directly are obviously domain names that I own AND were never listed on either of those two forums.
I welcome telephone inquires. I'm always happy to provide free consultation with no particular time limit. I enjoy brainstorming ideas with potential prospective buyers of any of the domain names I have to offer.
In respect to my recommended strategy of having multiple domain names directing traffic to your website, it is ideal for one of those domain names to match your business name, if possible; however, since many business names aren't very marketable, due to being long, complex, and not memorably catchy, even if such a business/domain name is yet meaningful, it is advantageous to have at least one additional, but simple, clever, and relevantly memorable domain name, different from your existing business/domain name that isn't meeting all of such criteria.
For example, let's say you operate your own Martial Arts School as a personal trainer, and you named your business: "Evolutionary Martial Arts!" This would be a decent business name because it's meaningful and implies your training philosophy may be on the cutting edge, but such a business name is not ideally marketable as a domain name, due to being long, complex, and not memorably catchy. On the other hand, a more simple domain name, such as SIDEKICK4U.COM, is very memorable, due to having a relevant double-meaning. It implies both a classic Martial Arts maneuver and lessons from perhaps a personal trainer.
Imagine SIDEKICK4U.COM on a bumper sticker with a couple of classic Martial Arts poses graphically silhouetted on the bumper sticker, flanking the domain name. Now, imagine being the instructor handing out such bumper stickers to your students and offering a 10% discount on the next lesson for each student who provides a photo or proof of the bumper sticker adhered to their rear bumper. Now, imagine all of your students driving around with bumper stickers, advertising your Martial Arts School, recruiting more students, who in turn do the same. It would practically be like having free mobile advertising billboards all over your city streets. Now that's cost-effective marketing!