Middle Irish acht

→ Middle Irish lennánacht (suffix)

→ Middle Irish amaidecht (suffix)

→ Middle Irish solustacht (suffix)

→ Middle Irish eigrecht (suffix)

→ Middle Irish daltacht (suffix)

→ Middle Irish sacartacht (suffix)

→ Middle Irish saigteóracht (suffix)

→ Middle Irish sindsirrdacht (suffix)

→ Middle Irish sinsirecht (suffix)

→ Middle Irish míadamlacht (suffix)

→ Middle Irish sailltecht (suffix)

→ Middle Irish cruittirecht (suffix)

→ Middle Irish saírsecht (suffix)

→ Middle Irish lenmaidecht (affix)

→ Middle Irish géilsinecht (suffix)

→ Middle Irish gíallacht (suffix)

→ Middle Irish cantairecht (suffix)

→ Middle Irish dorchacht (suffix)

→ Middle Irish bráthamlacht (suffix)