use '?' for JOKER (blank)

From letters F, I, N, G, E, R, P, R, I, N, T, S  I made following words

12 letter words

fingerprints[18]

11 letter words

fingerprint[17]

10 letter words

fingertips[16], presifting[16], infringers[14], prerinsing[13], reprinting[13]

9 letter words

prefiring[15], fingertip[15], inferring[13], infringer[13], infringes[13], infesting[13], fringiest[13], resifting[13], reprising[12], respiring[12], springier[12], priesting[12], respiting[12], printings[12], sprinting[12], ferritins[12], interring[10], inserting[10], sintering[10], stringier[10]

8 letter words

pfennigs[14], spitfire[13], infringe[12], refining[12], fringier[12], refiring[12], feinting[12], grifters[12], repining[11], ripening[11], speiring[11], spiering[11], respring[11], springer[11], printing[11], ferritin[11], finniest[11], ferninst[11], gripiest[11], spirting[11], striping[11], firriest[11], inspirer[10], pristine[10], stripier[10], printers[10], reprints[10], sprinter[10], resining[9], rerising[9], grinners[9], retiring[9], ginniest[9], igniters[9], resiting[9], stingier[9], restring[9], stringer[9], stirring[9]

7 letter words

pfennig[13], presift[12], finings[11], fingers[11], fringes[11], firings[11], rifting[11], grifter[11], fisting[11], sifting[11], peining[10], finnier[10], gripier[10], peising[10], sniping[10], pingers[10], springe[10], prising[10], spiring[10], gripers[10], niftier[10], finites[10], nifties[10], spiting[10], snifter[10], pinnies[9], inspire[9], spinier[9], pinners[9], spinner[9], spirier[9], printer[9], reprint[9], piniest[9], pinites[9], tiepins[9], tenpins[9], pitiers[9], tipsier[9], pterins[9], striper[9], ginnier[8], reining[8], grinner[8], insigne[8], seining[8], ginners[8], rinsing[8], ringers[8], igniter[8], tiering[8], renting[8], ringent[8], trining[8], ignites[8], nesting[8], tensing[8], resting[8], stinger[8], grister[8], tinnier[7], intines[7], interns[7], tinners[7]

6 letter words

fining[10], finger[10], fringe[10], firing[10], feigns[10], friges[10], griefs[10], feting[10], pieing[9], pining[9], pinger[9], riping[9], griper[9], genips[9], siping[9], infers[9], gripes[9], spring[9], firers[9], friers[9], finite[9], feints[9], finest[9], infest[9], pinier[8], pinner[8], pennis[8], repins[8], ripens[8], sniper[8], priers[8], sprier[8], pinite[8], tiepin[8], tenpin[8], periti[8], pitier[8], pterin[8], ginner[7], erring[7], ringer[7], ensign[7], reigns[7], renigs[7], resign[7], sering[7], signer[7], singer[7], rising[7], siring[7], rerigs[7], ignite[7], tieing[7], tining[7], engirt[7], tiring[7], ingest[7], signet[7], tinges[7], siting[7], inners[6], renins[6], sinner[6], rinser[6], intine[6], tinier[6], intern[6], tinner[6], seniti[6], sennit[6]