Fill in the blanks below to complete six common uncapitalized English words. The same four letters will be used as fill-in for each word, but in different orders.

1. L A N _ _ O _ _
2. _ I S C O _ _ O _ T
3. _ _ E E _ O _
4. _ I S _ I _ E _
5. _ E _ E R E N _ U _
6. _ _ A _ E _

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From Mensa Puzzle Calendar 2018 by Fraser Simpson, Workman Publishing, New York. Puzzle for November 4.