use '?' for JOKER (blank)

From letters F, L, U, O, R, O, C, H, R, O, M, E  I made following words

12 letter words

fluorochrome[22]

10 letter words

chloroform[20]

9 letter words

urochrome[16]

8 letter words

colourer[10]

7 letter words

moocher[14], roomful[12], lurcher[12], floorer[10], colorer[9], recolor[9], coruler[9]

6 letter words

moloch[13], chrome[13], chromo[13], hoofer[12], fuhrer[12], choler[11], formol[11], forcer[11], former[11], reform[11], louche[11], rouche[11], ferrum[11], churro[11], coelom[10], cormel[10], rolfer[9], reroof[9], roofer[9], fouler[9], furler[9], hurler[9], furore[9], cooler[8], roomer[8], colure[8], colour[8], ormolu[8], curler[8]

5 letter words

chemo[12], mooch[12], merch[12], mulch[12], mouch[12], mucho[12], mohel[10], cholo[10], force[10], chore[10], ocher[10], ochre[10], forme[10], homer[10], flume[10], ruche[10], churl[10], lurch[10], femur[10], fumer[10], rheum[10], forum[10], humor[10], mohur[10], churr[10], celom[9], comer[9], locum[9], mucor[9], mucro[9], floor[8], frore[8], flour[8], fluor[8], furor[8], ceorl[7], morel[7], cooer[7], color[7], romeo[7], corer[7], crore[7], ormer[7], morro[7], oleum[7], cruel[7], lucre[7], ulcer[7], lemur[7], clour[7], curer[7], recur[7], murre[7], cruor[7], rumor[7], lurer[5], ruler[5]

4 letter words

chef[12], chum[11], much[11], hoof[10], clef[9], lech[9], helm[9], echo[9], floc[9], loch[9], home[9], holm[9], coof[9], coho[9], homo[9], herm[9], corf[9], form[9], from[9], fume[9], ouch[9], curf[9], come[8], merc[8], corm[8], culm[8], floe[7], helo[7], hole[7], fool[7], loof[7], herl[7], lehr[7], fore[7], froe[7], hero[7], hoer[7], rolf[7], roof[7], flue[7], fuel[7], foul[7], furl[7], hurl[7], four[7], hour[7], cole[6], mole[6], cool[6], loco[6], loom[6], mool[6], merl[6], cero[6], core[6], more[6], omer[6], moor[6], room[6], clue[6], luce[6], mule[6], meou[6], moue[6], cure[6], ecru[6], curl[6], mure[6], curr[6], murr[6], oleo[4], lore[4], orle[4], role[4], lure[4], rule[4], euro[4], roue[4], lour[4], ruer[4]

3 letter words

feh[9], foh[9], fem[8], hem[8], mho[8], ohm[8], moc[7], elf[6], foe[6], hoe[6], oho[6], ooh[6], fer[6], cel[5], elm[5], mel[5], col[5], mol[5], coo[5], moo[5], rec[5], ole[3], loo[3]