like tony said, you can have more than one domain point towards your site. We have one for our company name, then each division of the company has a simpler "catchy" domain that is simple to remember. The trucks have the simply catchy domains on them. We do this for our fert, irrigation, lighting, construction, holiday decor and plowing divisions. So the fert trucks have the fert domain, etc. We do the same with marketing. If it is a marketing piece specifically for irrigation, then we use that domain. More general advertising, we use the domain for the full company name.
Why do people not respect us as they do other tradesmen? Because every Tom, Dick, and Harry doesn't think he can be a plumber or electrician!