You'll have to do it yourself. Multiple words can be specified here. All displayed entries are separated by a line of dashes. Alongside each word, the numbers of the entries that contain the word are displayed. Unlike a word, only one number can be specified.
Error handling needs work.
Nothing is output if a word is not found in the thesaurus. There are typos in the thesaurus, which can cause the scripts to mis-index very small parts of the thesaurus. The scripts used to build the indices are inefficient and are unbelievably poorly written. Fortunately, this doesn't really matter, as the index creation process is a one-time task. Looking up words in the thesaurus is quite fast.