I ask because the likelihood of this question turning up is greater as time goes by and it's best to have this sooner rather than later.
Not all cultures approve of the word "ham", despite it being a very common way of describing the hobby. In particular, anything pork related is banned from import in several Muslim countries. The Pakistan Telecommunication Authority, in their official pages, describes the hobby as "Amateur Radio" and never as "ham radio".
Wikipedia describes the hobby as "Amateur radio, also known as ham radio", and since we drop "radio" either way, can we not just use "amateur", or if we choose to include it "amateur radio", as the subdomain?