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

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5 letter words:

roofs8,

4 letter words:

firs7, foss7, rifs7, roof7, sirs4, sori4, sris4,

3 letter words:

fir6, for6, fro6, ifs6, rif6, ors3, sir3, sis3, sos3, sri3,

2 letter words:

if5, of5, is2, oi2, or2, os2, si2, so2,