CIRCUMBASAL

aa ab ai al am ar as ba bi is la li ma mi mu si um us

aal aas aba abs ail aim air ais ala alb als ama ami amu arb arc arm ars baa bal bam bar bas bis bra bum bur bus cab cam car cis cru cub cum cur ism lab lac lam lar las lib lis lum mac mar mas mib mic mil mir mis mus rai ram ras ria rib rim rub rum sab sac sal sau sib sic sim sir sri sub sum urb

aals abas abri ails aims airs alar alas alba albs alma alms alum amas amia amir amis amus arbs arcs aria aril arms arum asci aura baal baas bail balm bals bams barm bars bias bima birl blam blur bras brim bris bums bura burl burs cabs caca calm cams carb carl cars casa caul clam club crab cram crib cris crus cubs culm curb curl curs iamb isba labs lacs laic lair lama lamb lams lari lars liar libs lima limb lira luma lums maar macs mail mair mara marc marl mars masa maul mibs mica mics mils mirs mura raia rail rais rami rams rial rias ribs rims rubs rums sail sari saul scab scam scar scum sial sima slab slam slim slub slum slur suba sura urbs uric ursa