A few linguistically conservative style manuals still claim the clunky, two-word Web site is better than website, but very few publications agree. Most switched to the one-word website long ago.
Examples
For example, these publications use website:
Rep. Michele Bachmann promotes her new autobiography, “Core of Conviction,” on the homepage of her campaign website. [Wall Street Journal]
What is the difference between a national newspaper’s online offering and any other website? [Guardian]
Growing numbers of Chinese merchants are struggling to collect their money from daily deals websites … [Financial Times]
There are some exceptions. For example, the New York Times still uses Web site. Others, such the Washington Post, use website and Web site about equally often. These holdouts will undoubtedly switch to website sooner or later.
