AMBIPAROUS

aa ab ai am ar as ba bi bo is ma mi mo mu oi om op or os pa pi si so um up us

aas aba abo abs aim air ais ama ami amp amu apo arb arm ars asp baa bam bap bar bas bio bis boa bop bos bra bro bum bur bus imp ism map mar mas mib mir mis moa mob mop mor mos mus oar oba obi oms ops ora orb ors our pam par pas pia pis piu poi pom pro psi pub pur pus rai ram rap ras ria rib rim rip rob rom rub rum sab sap sau sib sim sip sir sob som sop sou spa sri sub sum sup ump upo ups urb urp

abas abos abri aims airs amas ambo amia amir amis amps amus apos arbs aria arms arum aura baas bams baps barm bars bias bima bios biro boar boas bops bora bras brim brio bris bros bump bums bura burp burs iamb imps isba maar mair maps mara mars masa mibs mips mirs miso moas mobs mops mora mors mura oars obas obia obis opus orbs osar ours pair pams para pars pias pima piso pois poms pour pram prao prau prim proa prom pros pubs puma puri purs raia rais rami ramp rams raps rasp rias ribs rims rips roam robs romp roms roup rubs rump rums samp sari sima simp soap soar soba soma sora sorb sori soup sour spam spar spur suba sumo sump sura umbo umps upas urbs urps ursa