Mammoth Uncensored Word List:
25 words ending with na, 10 letters long

anguifauna belladonna chinachina concertina interregna macrofauna mediastina microfauna parmigiana phaenomena phagedaena philippina philopoena phlyctaena piscifauna plastilina pozzuolana praenomina primadonna quinaquina scarlatina tibouchina tramontana tsesarevna victoriana