no dude

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern CES-O-. That is, six letter words with 1st letter C and 2nd letter E and 3rd letter S and 5th letter O. In alphabetical order, they are:

cestoi

cestos

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 19 words with the pattern C--TO-. That is, six letter words with 1st letter C and 4th letter T and 5th letter O. In alphabetical order, they are:

canton

cantor

cantos

captor

carton

cartop

castor

centos

cestoi

cestos

chaton

chiton

contos

cotton

craton

croton

custom

custos

cuttoe

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 29 words with the pattern --STO-. That is, six letter words with 3rd letter S and 4th letter T and 5th letter O. In alphabetical order, they are:

bastos

bestow

boston

castor

cestoi

cestos

custom

custos

fustoc

gustos

mestom

nestor

nostoc

nostoi

nostos

pastor

pestos

pistol

piston

pistou

postop

restos

seston

teston

unstop

unstow

vistos

xystoi

xystos

mascot, pistol, fusion

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Common 6-letter words that meet your requirements:

basion, bassos, besnow, bestow, bishop, boston, busboy, cashoo, castor, cestos, ciscos, cosmos, custom, custos, despot, discos, fusion, gascon, hyssop, kussos, lassos, lesbos, lesion, lesson, lessor, lissom, mascon, mascot, muskox, nasion, nestor, nostoc, paseos, pastor, pestos, piscos, pistol, piston, pistou, postop, reshod, reshot, reshow, respot, roscoe, teston, tussor, unshod, unstop, upshot, vision, wisdom, xystoi, xystos,