It is dropped in the "Connal Currach" stage in the swamp. You
must be on cycle 2 at least for it to drop, but it is still fairly
rare.
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According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 3 words with the pattern -U---CH.
That is, seven letter words with 2nd letter U and 6th letter C and
7th letter H. In alphabetical order, they are:
autarch
currach
quetsch
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According to SOWPODS (the combination of Scrabble dictionaries
used around the world) there are 6 words with the pattern C---A-H.
That is, seven letter words with 1st letter C and 5th letter A and
7th letter H. In alphabetical order, they are: