use '?' for JOKER (blank)

From letters I, M, P, E, R, F, E, C, T, I, V, E, S  I made following words

13 letter words

imperfectives[25]

12 letter words

imperfective[24]

11 letter words

perfectives[21], misperceive[20]

10 letter words

perfective[20], imperfects[19], respective[17], timepieces[16]

9 letter words

imperfect[18], refective[17], specifier[16], perceives[16], receptive[16], imprecise[15], timepiece[15], epistemic[15], crimpiest[15], certifies[14], rectifies[14], metrifies[14], petrifies[14], secretive[14], semierect[13], creepiest[13]

8 letter words

perfects[15], prefects[15], perceive[15], epimeric[14], empirics[14], misprice[14], scrimpit[14], verifies[14], tepefies[13], fiercest[13], spitfire[13], receives[13], erective[13], evictees[13], vertices[13], veristic[13], previsit[13], priviest[13], creepies[12], emperies[12], epimeres[12], preemies[12], eremitic[12], meristic[12], scimiter[12], trisemic[12], crepiest[12], receipts[12], picrites[12], priciest[12], emptiers[12], reefiest[11], feistier[11], ferities[11], fieriest[11], verities[11], eremites[10]

7 letter words

fictive[15], perfect[14], prefect[14], viremic[14], victims[14], empiric[13], spermic[13], festive[13], misfire[12], semifit[12], refects[12], firmest[12], presift[12], receive[12], scrieve[12], service[12], previse[12], privies[12], evictee[12], vitrics[12], privets[12], creepie[11], epeiric[11], epimere[11], preemie[11], mercies[11], piecers[11], pierces[11], precise[11], recipes[11], spicier[11], empires[11], emprise[11], epimers[11], imprese[11], premies[11], premise[11], spireme[11], pismire[11], primsie[11], receipt[11], picrite[11], premeet[11], emptier[11], emetics[11], miscite[11], empties[11], septime[11], pietism[11], cermets[11], metrics[11], trismic[11], recepts[11], respect[11], scepter[11], sceptre[11], specter[11], spectre[11], triceps[11], tempers[11], imprest[11], permits[11], reifies[10], veeries[10], restive[10], sievert[10], veriest[10], verites[10], revisit[10], visiter[10], emeries[9], peeries[9], seepier[9], eremite[9], emeriti[9], itemise[9], epeeist[9], pieties[9], secrete[9], cerites[9], recites[9], tierces[9], eristic[9], meeters[9], remeets[9], teemers[9], meister[9], metiers[9], reemits[9], retimes[9], triseme[9], miriest[9], mistier[9], rimiest[9], steeper[9], pestier[9], respite[9], pitiers[9], tipsier[9], eeriest[7]

6 letter words

crimps[12], scrimp[12], fierce[11], fermis[11], refect[11], piecer[10], pierce[10], recipe[10], empire[10], epimer[10], premie[10], emcees[10], pieces[10], specie[10], cremes[10], merces[10], crimes[10], creeps[10], crepes[10], cripes[10], precis[10], prices[10], spicer[10], sempre[10], primes[10], simper[10], spirem[10], emetic[10], feirie[9], frisee[9], peerie[8], creese[8], cerise[8], emeers[8], seemer[8], remise[8], cerite[8], recite[8], tierce[8]