use '?' for JOKER (blank)

From letters I, N, T, E, R, D, I, G, I, T, A, T, E  I made following words

13 letter words

interdigitate[15]

11 letter words

reinitiated[12]

10 letter words

integrated[12], itinerated[11], reinitiate[10]

9 letter words

denigrate[11], gratineed[11], reediting[11], reignited[11], deratting[11], dietitian[10], initiated[10], denitrate[10], intreated[10], argentite[10], integrate[10], iterating[10], tritiated[10], tattering[10], attriting[10], titrating[10], tittering[10], itinerate[9]

8 letter words

regained[10], deairing[10], ideating[10], digerati[10], derating[10], gradient[10], redating[10], treading[10], digitate[10], targeted[10], dratting[10], detainer[9], retained[9], gratinee[9], interage[9], daintier[9], reignite[9], retieing[9], iterated[9], aigrette[9], attender[9], nattered[9], rattened[9], nitrated[9], retinted[9], gnattier[9], treating[9], attiring[9], tattered[9], attrited[9], titrated[9], tittered[9], inertiae[8], initiate[8], intertie[8], retinite[8], titanite[8]

7 letter words

angered[9], derange[9], enraged[9], grandee[9], grenade[9], deraign[9], gradine[9], grained[9], reading[9], dreeing[9], energid[9], reeding[9], reigned[9], raiding[9], dingier[9], agented[9], negated[9], dieting[9], editing[9], ignited[9], triaged[9], dragnet[9], granted[9], darting[9], trading[9], gritted[9], reginae[8], denarii[8], inedita[8], grantee[8], greaten[8], negater[8], reagent[8], antired[8], detrain[8], trained[8], granite[8], gratine[8], ingrate[8], tangier[8], tearing[8], integer[8], treeing[8], inditer[8], nitride[8], airting[8], igniter[8], tiering[8], dentate[8], tentage[8], tainted[8], dinette[8], treated[8], attired[8], tergite[8], trident[8], ratting[8], tarting[8], gittern[8], retting[8], tatting[8], arenite[7], retinae[7], trainee[7], inertia[7], niterie[7], ariette[7], iterate[7], entreat[7], ratteen[7], ternate[7], intreat[7], iterant[7], nattier[7], nitrate[7], tertian[7], nettier[7], tentier[7], nitrite[7], nittier[7], attrite[7], tattier[7], titrate[7], titrant[7]

6 letter words

gained[8], aiding[8], dieing[8], agreed[8], dragee[8], geared[8], edgier[8], danger[8], gander[8], garden[8], ranged[8], gender[8], daring[8], gradin[8], dinger[8], engird[8], girned[8], reding[8], ringed[8], riding[8], gaited[8], tanged[8], dating[8], nidget[8], tinged[8], aedine[7], aeried[7], dearie[7], rediae[7], earned[7], endear[7], neared[7], enrage[7], genera[7], denari[7], rained[7], denier[7], nereid[7], reined[7], earing[7], gainer[7], reagin[7], regain[7], regina[7], airing[7], ideate[7], anteed[7], negate[7], detain[7], nidate[7], endite[7], eating[7], ingate[7], teeing[7], indite[7], teniae[6]