use '?' for JOKER (blank)

From letters Z, E, P, T, O, S, E, C, O, N, D  I made following words

11 letter words

zeptosecond[24]

9 letter words

endoscope[14], copestone[13]

8 letter words

postcode[13], potences[12], pentodes[11], ecotones[10]

7 letter words

cozened[18], snoozed[16], scooped[12], coopted[12], postdoc[12], pocosen[11], potence[11], pectens[11], encodes[10], seconde[10], condoes[10], secondo[10], depones[10], spondee[10], snooped[10], spooned[10], pentode[10], descent[10], scented[10], cestode[10], escoted[10], docents[10], scooted[10], stooped[10], ecotone[9], cenotes[9], openest[9], pentose[9], posteen[9], poteens[9], denotes[8], snooted[8]

6 letter words

cozens[16], zooned[15], dozens[15], zested[15], ozones[14], snooze[14], ponced[11], cooped[11], scoped[11], spence[10], copens[10], ponces[10], pecten[10], coopts[10], encode[9], cooeed[9], depone[9], opened[9], censed[9], codens[9], second[9], codons[9], condos[9], depose[9], epodes[9], speedo[9], decent[9], docent[9], costed[9], depots[9], despot[9], posted[9], stoped[9], cooees[8], peones[8], cenote[8], poteen[8], centos[8], contes[8], contos[8], nostoc[8], topees[8], netops[8], pontes[8], donees[7], nodose[7], noosed[7], odeons[7], denote[7], nested[7], tensed[7], stoned[7], sooted[7], tondos[7]

5 letter words

cozen[15], coped[10], pence[9], copen[9], ponce[9], cepes[9], copes[9], copse[9], scope[9], coops[9], scoop[9], coopt[9], coden[8], coned[8], cooed[8], codon[8], condo[8], epode[8], pooed[8], cedes[8], scend[8], codes[8], coeds[8], decos[8], deeps[8], pedes[8], speed[8], pends[8], spend[8], dopes[8], posed[8], spode[8], ponds[8], poods[8], coted[8], depot[8], opted[8], toped[8], cooee[7], cense[7], scene[7], cones[7], scone[7], coons[7], neeps[7], peens[7], penes[7], opens[7], peons[7], pones[7], poons[7], snoop[7], spoon[7], cento[7], conte[7], oncet[7], conto[7], topee[7], netop[7], cetes[7], cents[7], scent[7], coset[7], cotes[7], escot[7], coots[7], scoot[7], steep[7], spent[7], estop[7], pesto[7], poets[7], stope[7], topes[7], stoop[7], topos[7], donee[6], odeon[6], denes[6], dense[6], needs[6], nodes[6], nosed[6], sonde[6], snood[6], noted[6], toned[6], tondo[6], deets[6], steed[6], dents[6], tends[6], doest[6], dotes[6], stood[6], noose[5], sente[5], teens[5], tense[5], notes[5], onset[5], seton[5], steno[5], stone[5], tones[5], snoot[5], toons[5]