You could simply have a string containing all your words with the default delimiter.
car,fence,loophole,bat,cigarette,opium,bottle,wheel,...
Then if you used the gettoken expression like so
Gettoken(string,4)
would return "bat" in case of this example. Get it?
You could insert a random word easily into sentence for example:
"He opened the trunk and there it was: a giant "&Gettoken(string,Random(Numtokens(string)+1))
The Numtokens expression counts the number of tokens, the plus one is there because the Random expression is 0-based.
Hope that helped!