Scrabble dictionary, Word with Friends, search for words, check words

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5 letter words:

first8, frits8, rifts8,

4 letter words:

firs7, fist7, fits7, frit7, rifs7, rift7, sift7, stir4,

3 letter words:

fir6, fit6, ifs6, rif6, its3, sir3, sit3, sri3, tis3,

2 letter words:

if5, is2, it2, si2, ti2,