ACHROMOUS

ah am ar as ha hm ho ma mo mu oh om or os sh so uh um us

ahs amu arc arm ars ash cam car coo cor cos cru cum cur ham hao has hos hum mac mar mas mho moa moc moo mor mos mus oar oca ohm oho ohs oms ooh ora orc ors our rah ram ras rho roc rom rum sac sau sha som sou sum

amus arch arco arcs arms arum camo cams cars cash cham chao char chum coho coma coos corm cors cosh cram crus curs hams harm hoar homo hora hour hums mach macs marc mars mash mhos moas mocs moor moos mora mors mosh much mura mush oars ocas ohms oohs orca orcs osar ouch ours rams rash rhos rhus roam rocs roms room rums rush scam scar scum sham shmo shoo soar soca soma sora sour such sumo sura ursa