use '?' for JOKER (blank)

From letters N, O, T, W, I, T, H, S, T, A, N, D, I, N, G  I made following words

15 letter words

notwithstanding[23]

12 letter words

withstanding[20]

10 letter words

inswathing[17], nightstand[15], antidoting[12], intonating[11], stationing[11]

9 letter words

shadowing[17], tightwads[17], thindowns[16], withstand[16], disowning[14], gnathions[13], wantoning[13], twinnings[13], tithonias[12], indignant[11], anointing[10], nidations[10], instating[10]

8 letter words

tightwad[16], thindown[15], swathing[15], whisting[15], whitings[15], twinight[15], whatnots[14], indowing[13], windings[13], windigos[13], shinning[12], thinning[12], gnathion[12], hoisting[12], nothings[12], shitting[12], tithings[12], shotting[12], tonights[12], swanning[12], winnings[12], twinning[12], waisting[12], waitings[12], swatting[12], twisting[12], wittings[12], swotting[12], twitting[12], thionins[11], tithonia[11], nidating[10], iodating[10], donating[10], standing[10], dittoing[10], nidation[9], intoning[9], sainting[9], staining[9], tannings[9], tainting[9], notating[9], stinting[9], tintings[9], toasting[9], tattings[9], stotting[9], santonin[8], ostinati[8]

7 letter words

whining[14], shawing[14], washing[14], wishing[14], showing[14], thawing[14], whiting[14], withing[14], withins[13], townish[13], whatnot[13], whatsit[13], handing[12], dashing[12], shading[12], dishing[12], hidings[12], shindig[12], hagdons[12], sandhog[12], dawning[12], dwining[12], winding[12], windigo[12], downing[12], dowsing[12], dawting[12], godwits[12], shining[11], hoising[11], donnish[11], noshing[11], hanting[11], hinting[11], anthoid[11], nothing[11], hasting[11], histing[11], insight[11], toadish[11], goatish[11], histoid[11], hosting[11], hatting[11], hitting[11], tithing[11], hotting[11], tonight[11], wanning[11], winning[11], wonning[11], awnings[11], snawing[11], inwinds[11], snowing[11], waiting[11], wanting[11], twining[11], wonting[11], tawsing[11], wasting[11], wisting[11], stowing[11], witting[11], wotting[11], thionin[10], tahinis[10], tannish[10], tonnish[10], wanions[10], wantons[10], intwist[10], nitwits[10], dinning[9], gonidia[9], donning[9], siganid[9], sanding[9], ganoids[9], indigos[9], dinting[9], doating[9], tidings[9], dotting[9], saining[8], nandins[8], innings[8], sinning[8], noising[8], tanning[8], tinning[8], atoning[8], distain[8], antings[8], staning[8], agonist[8], gitanos[8], stoning[8], tinting[8], toiting[8], distant[8], stating[8], tasting[8], sitting[8], tatting[8], totting[8], tannins[7], anoints[7], nations[7], onanist[7], titians[7], instant[7], station[7]

6 letter words

hading[11], hiding[11], hagdon[11], honing[10], danish[10], sandhi[10], ashing[10], aiding[8], dining[8], indign[8], niding[8], ganoid[8], indigo[8], siding[8], nandin[7], inning[7], saning[7]