You have edited your original posting, which now makes all nodes which answered your original query look totally weird. Please do not do that: it is considered bad form in the Monastery.

Rather either keep the original posting and provide additional information in follow-up nodes or update it but clearly indicate what was changed (hint: use <ins> ...</ins> for insertions and <del> ...</del> for deletions.

If we understand your new question, you need to check a list of words against another list of words. If you like to avoid two loops and repeated regex-tests, have a look at Regexp::Keywords (A regexp builder to test against keywords lists), Regexp::Match::List (Matches a string to a list of regular expressions) or Regexp::Assemble (Assemble multiple Regular Expressions into a single RE).

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