use '?' for JOKER (blank)

From letters C, O, U, N, T, E, R, S, T, R, E, A, M, S  I made following words

14 letter words

counterstreams[18]

13 letter words

counterstream[17]

12 letter words

remonstrates[14]

11 letter words

scoutmaster[15], remonstrate[13], easternmost[13], arrestments[13], enumerators[13], tetramerous[13], menstruates[13]

10 letter words

sarcomeres[14], octameters[14], mercurates[14], castoreums[14], outscreams[14], reenactors[12], antecessor[12], arrestment[12], rectorates[12], rotameters[12], tormenters[12], contesters[12], assortment[12], scatterers[12], streetcars[12], smatterers[12], enumerator[12], crenatures[12], raconteurs[12], recounters[12], numerators[12], courtesans[12], neuromasts[12], rousements[12], construers[12], utterances[12], menstruate[12], testaceous[12], transmutes[12], cotrustees[12], outmasters[12], saunterers[10]

9 letter words

sarcomere[13], romancers[13], screamers[13], cremators[13], casements[13], octameter[13], consumers[13], mucronate[13], mercurate[13], castoreum[13], outscream[13], costumers[13], customers[13], tumescent[13], recensors[11], ransomers[11], reenactor[11], carotenes[11], recanters[11], recreants[11], notecases[11], reascents[11], sarcenets[11], steersman[11], ancestors[11], monsteras[11], remasters[11], streamers[11], crosstree[11], secretors[11], rectorate[11], rotameter[11], tormenter[11], contester[11], trecentos[11], scatterer[11], streetcar[11], smatterer[11], tetramers[11], retroacts[11], statesmen[11], tesseract[11], teamsters[11], transects[11], contrasts[11], sternmost[11], rearmouse[11], usernames[11], ecraseurs[11], measurers[11], censurers[11], surnamers[11], carousers[11], recourses[11], resources[11], crenature[11], raconteur[11], recounter[11], numerator[11], uncreates[11], numerates[11], courantes[11], courtesan[11], nectarous[11], outrances[11], neuromast[11], rousement[11], creatures[11], construer[11], trouncers[11], acuteness[11], setaceous[11], seamounts[11], secateurs[11], recusants[11], muensters[11], construes[11], utterance[11], eructates[11], truncates[11], transmute[11], cotrustee[11], outmaster[11], tautomers[11], turncoats[11], mutterers[11], outcastes[11], metestrus[11], outsmarts[11], reasoners[9], earstones[9], resonates[9], ratteners[9], rearouses[9], renatures[9], saunterer[9], sauternes[9], anestrous[9], treasures[9], retrousse[9], tetanuses[9], austerest[9], utterness[9], outstares[9], seatrouts[9], outsteers[9]

8 letter words

romancer[12], menacers[12], racemose[12], romances[12], amercers[12], creamers[12], screamer[12], crossarm[12], cremator[12], casement[12], cremates[12], recensor[10], ransomer[10], anemoses[10], casernes[10], coarsens[10], narcoses[10], necroses[10], moreness[10], caresser[10], creasers[10], smearers[10], rescores[10], remorses[10], scorners[10], carotene[10], recanter[10], recreant[10], acetones[10], notecase[10], centares[10], reascent[10], reenacts[10], sarcenet[10], ancestor[10], enactors[10], monstera[10], onstream[10], tonearms[10], caterers[10], recrates[10], retraces[10], terraces[10], remaster[10], streamer[10], reasoner[8], reseason[8], seasoner[8], rareness[8], serranos[8], earstone[8], resonate[8]