use '?' for JOKER (blank)

From letters V, I, V, I, S, E, C, T, I, O, N, I, S, T, S  I made following words

15 letter words

vivisectionists[23]

14 letter words

vivisectionist[22]

12 letter words

vivisections[20]

11 letter words

vivisection[19], viscosities[16]

10 letter words

vicinities[15], vinosities[13], ionicities[12], tonicities[12], scientists[12]

9 letter words

vivisects[17], evictions[14], scientist[11], stictions[11]

8 letter words

vivisect[16], incisive[13], invoices[13], viscoses[13], eviction[13], cessions[10], cosiness[10], scission[10], sections[10], consists[10], osteitic[10], stenotic[10], tonetics[10], stiction[10], scotties[10], contests[10], inosites[8], noisiest[8], sonsiest[8], stenosis[8], osteitis[8], otitises[8], stoniest[8], stetsons[8]

7 letter words

civvies[15], votives[13], invoice[12], novices[12], viscose[12], costive[12], visions[10], invites[10], viniest[10], invests[10], soviets[10], eosinic[9], nicoise[9], iciness[9], incises[9], cession[9], cosines[9], oscines[9], cissies[9], incites[9], notices[9], section[9], incests[9], insects[9], cosiest[9], consist[9], tocsins[9], cossets[9], tonetic[9], scottie[9], contest[9], ionises[7], seisins[7], essoins[7], osseins[7], session[7], inosite[7], nosiest[7], insists[7], tiniest[7], toniest[7], stetson[7], testons[7], stotins[7]

6 letter words

visive[12], votive[12], novice[11], civies[11], voices[11], covens[11], covins[11], civets[11], evicts[11], covets[11], envois[9], ovines[9], vision[9], invite[9], invest[9], soviet[9], visits[9], stoves[9], incise[8], conies[8], cosine[8], icones[8], oscine[8], ionics[8], cosies[8], scones[8], scions[8], sonics[8], incite[8], noetic[8], notice[8], cities[8], iciest[8], incest[8], insect[8], nicest[8], cestoi[8], centos[8], contes[8], tocsin[8], tonics[8], scents[8], cestos[8], cosets[8], cosset[8], escots[8], stoics[8], otitic[8], tincts[8], octets[8], ionise[6], niseis[6], seisin[6], enosis[6], eosins[6], essoin[6], noesis[6], noises[6], ossein[6], sonsie[6], isseis[6], seniti[6], insets[6], steins[6], insist[6], onsets[6], setons[6], stenos[6], stones[6], tosses[6], sitten[6], otitis[6], teston[6], stotin[6], testis[6], stents[6], stints[6]

5 letter words

ionic[7], cines[7], since[7], cosie[7], cones[7], scone[7], cions[7], coins[7], icons[7], scion[7], sonic[7], sices[7], coses[7], cento[7], conte[7], oncet[7], ontic[7], tonic[7], cesti[7], cites[7], cents[7], scent[7], coset[7], cotes[7], escot[7], stoic[7], nisei[5], eosin[5], noise[5], issei[5], sines[5], noses[5], sones[5], sises[5], inset[5], neist[5], nites[5], senti[5], stein[5], tines[5], intis[5]