Mammoth Uncensored Word List:
29 words ending with ea, 9 letters long

bradypnea centaurea crustacea diarrhoea echinacea gonorrhea grevillea hydrangea hyperpnea hypopnoea iminourea kahikatea logorrhea menorrhea mesogloea orthopnea otorrhoea panachaea perifovea periostea peritonea platypnea proctodea propylaea pyorrhoea seborrhea stomodaea tachypnea trepopnea