You might want to split on
/\s+/ to be more robust. This will match white space of more than one character.
You could also split on /\b/ and then grep for word characters if you wanted a slightly different definition of a word. This would split words with hyphons and apostorphes which might or might not be what you want.
@words = grep (/\w/, split (/\b/, $foo));
-monkfish (The Fishy Monk)
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