Yes, explorer is a Scrabble word!
...and is worth 17 points in Scrabble, and 19 points in Words with Friends
explorer
Noun
1. Someone who travels into little known regions (especially for some scientific purpose)
2. A commercial browser
What Scrabble words can I make with the letters in explorer?
7 Letter Words
6 Letter Words
5 Letter Words
4 Letter Words
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3 Letter Words
2 Letter Words