For example, is it possible to search with one regex statement and get the matched word?
Yes. But I've no idea how why that fact is useful to you. Considering you need to know from
every word whether it matches or not, it doesn't help you to know just one of them is matching.
Theoretically, you could do something like
/(word1|word2|word3|...){?{ push @matches, $^N })(*FAIL)/
but that will usually not be faster than
/word1/ && ...;
/word2/ && ...;
/word3/ && ...;
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