singular plural nominative opalus opalī genitive opalī opalōrum dative opalō opalīs accusative <span class="searchmatch">opalum</span> opalōs ablative opalō opalīs vocative opale opalī...
singular plural nominative opál opály genitive opálu opálů dative opálu <span class="searchmatch">opálům</span> accusative opál opály vocative opále opály locative opálu opálech instrumental...