Q: Is a website address that ends in .accountants a site you can trust or is it a fake?
A: In the early days of the internet there were only a few top level domains (for example: .gov, .ac, .com) but these soon got used up.
New top level domains have now been agreed, so you will see more of them. As well as .accountants you will see .book, .camera, .dental, .golf among many others. For a full list go to Wikipedia https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains
Any site with these new domain names may be dubious for other reasons, but not because of the domain name.
Source: Phil Bradley in CILIP UPdate, March 2017