OPSONIFIES

ef en es fe if in is ne no oe of oi on op os pe pi si so

efs ens eon ess fen fes fie fin foe fon fop ifs ins ion nip noo nos oes one ono ons ope ops ose pen pes pie pin pis poi poo psi sei sen sin sip sis son sop sos

eons epos fens fess fine fino fins foes foin fons fops foss info ions neif ness nips nisi noes nope nose ones onos oops open opes oses pein pens peon peso pies pine pins pion piso piss pois pone pons poof poon poos pose psis seif seis sine sins sipe sips snip sone sons soon sops spin