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7 letter words:

sycosis12,

5 letter words:

cissy10, sissy8,

4 letter words:

cosy9, coys9, soys7, coss6, sics6,

3 letter words:

coy8, icy8, soy6, cis5, cos5, sic5, sis3, sos3,

2 letter words:

oy5, yo5, is2, oi2, os2, si2, so2,