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From letters A, C, Q, U, I, E, S, C, E, D  I made following words

10 letter words

acquiesced[23]

9 letter words

acquiesce[21]

8 letter words

caciques[20], caudices[13]

7 letter words

cacique[19], casqued[18], caiques[17], accedes[12], caducei[12], accused[12], succeed[12]

6 letter words

caique[16], casque[16], sacque[16], equids[15], accede[11], sicced[11], caseic[10], ecesic[10], accuse[10], ceased[9], deices[9], caused[9], sauced[9], deuces[9], educes[9], seduce[9], adieus[7]

5 letter words

qadis[14], qaids[14], equid[14], quads[14], squad[14], quids[14], squid[14], quais[13], quasi[13], cusec[9], deice[8], cades[8], cased[8], daces[8], cedes[8], acids[8], asdic[8], cadis[8], caids[8], cedis[8], dices[8], deuce[8], educe[8], duces[8], scudi[8], cease[7], saice[7], cause[7], sauce[7], aedes[6], eased[6], aides[6], aside[6], ideas[6], adieu[6], suede[6]

4 letter words

qadi[13], qaid[13], quad[13], quid[13], quai[12], ceca[8], aced[7], cade[7], dace[7], cede[7], acid[7], cadi[7], caid[7], cedi[7], dice[7], iced[7], cads[7], scad[7], disc[7], cued[7], duce[7], duci[7], cuds[7], scud[7], aces[6], case[6], cees[6], asci[6], ices[6], sice[6], cues[6], ecus[6], aide[5], idea[5], eide[5], sade[5], dees[5], seed[5], aids[5], dais[5], sadi[5], said[5], dies[5], ides[5], side[5], dues[5], sued[5], used[5], ease[4]

3 letter words

qis[11], qua[11], suq[11], cad[6], cud[6], ace[5], cee[5], ice[5], sac[5], sec[5], cis[5], sic[5], cue[5], ecu[5], dee[4], aid[4], die[4], ads[4], sad[4], eds[4], dis[4], ids[4], due[4], dui[4], sae[3], sea[3], see[3], ais[3], sei[3], eau[3], sau[3], sue[3], use[3]

2 letter words

qi[10], ad[3], de[3], ed[3], id[3], ae[2], ai[2], as[2], es[2], is[2], si[2], us[2]