Send a request to the website "randomword.com", take the first line of the response, echo it, remove all characters except A-Z, a-z, and 0-9, fold it into 7 characters, take the first line, echo it, and shuffle it to get one random word.
curl http://www.randomword.com/ | head -1 | xargs -I % echo % | xargs -I % tr -dc 'A-Za-z0-9' | fold -w 7 | head -1 | xargs -I % xargs -I % printf '\n%\n' % | shuf -n 1