use '?' for JOKER (blank)

From letters D, A, R, K, E, N, E, R, S  I made following words

9 letter words

darkeners[14]

8 letter words

darkener[13], kneaders[13]

7 letter words

kneader[12], nakeder[12], knarred[12], sneaked[12], dekares[12], darkens[12], sneaker[11], rankers[11], endears[8], readers[8], redears[8], rereads[8], darners[8], errands[8], renders[8], earners[7], reearns[7]

6 letter words

dekare[11], danker[11], darken[11], narked[11], ranked[11], kerned[11], darker[11], kneads[11], snaked[11], drakes[11], ranker[10], akenes[10], skeane[10], rakees[10], kernes[10], rakers[10], earned[7], endear[7], neared[7], dearer[7], reader[7], reared[7], redear[7], reread[7], darner[7], errand[7], render[7], erased[7], reseda[7], seared[7], denars[7], redans[7], sander[7], snared[7], denser[7], enders[7], resend[7], sender[7], darers[7], drears[7], earner[6], nearer[6], reearn[6], arenes[6], ranees[6], eraser[6], searer[6], snarer[6]

5 letter words

knead[10], naked[10], kneed[10], drake[10], raked[10], drank[10], asked[10], dekes[10], skeed[10], darks[10], dreks[10], akene[9], rakee[9], kerne[9], raker[9], akees[9], kanes[9], skean[9], snake[9], sneak[9], keens[9], knees[9], skeen[9], skene[9], asker[9], eskar[9], rakes[9], saker[9], esker[9], reeks[9], karns[9], knars[9], narks[9], ranks[9], snark[9], kerns[9], eared[6], denar[6], redan[6], ender[6], darer[6], drear[6], rared[6], erred[6], aedes[6], eased[6], deans[6], saned[6], sedan[6], denes[6], dense[6], needs[6], dares[6], dears[6], rased[6], reads[6], deers[6], drees[6], redes[6], reeds[6], seder[6], sered[6], darns[6], nards[6], rands[6], nerds[6], rends[6], arene[5], ranee[5], reran[5], erase[5], saree[5], earns[5], nares[5], nears[5], saner[5], snare[5], ernes[5], sneer[5], rares[5], raser[5], rears[5], serer[5]

4 letter words

deke[9], eked[9], dank[9], dark[9], drek[9], daks[9], desk[9], akee[8], kane[8], keen[8], knee[8], rake[8], reek[8], karn[8], knar[8], nark[8], rank[8], kern[8], kaes[8], keas[8], sake[8], ekes[8], seek[8], skee[8], dean[5], dene[5], need[5], dare[5], dear[5], read[5], deer[5], dere[5], dree[5], rede[5], reed[5], darn[5], nard[5], rand[5], nerd[5], rend[5], sade[5], dees[5], seed[5], earn[4], near[4], erne[4], rare[4], rear[4], ease[4]