amphitheatre的复数形式为：amphitheatres...

hazard的复数形式为：hazards...

herb的复数形式为：herbs...

heretic的复数形式为：heretics...

bugaboo的复数形式为：bugaboos...

iceman的复数形式为：icemen...

altostratus的复数形式为：altostrati...

special effect的复数形式为：special effects...

jacal的复数形式为：jacals...

absurdity的复数形式为：absurdities...

nightcap的复数形式为：nightcaps...

periscope的复数形式为：periscopes...

streamline的复数形式为：streamlines...

acronym的复数形式为：acronyms...

hall的复数形式为：halls...

wallaby的复数形式为：wallabies...

acquisition的复数形式为：acquisitions...

insignificancy的复数形式为：insignificancies...

protein的复数形式为：proteins...

ashtray的复数形式为：ashtrays...

figurehead的复数形式为：figureheads...

snatch的复数形式为：snatches...

embracery的复数形式为：embraceries...

pragmatist的复数形式为：pragmatists...

bromide的复数形式为：bromides...

profession的复数形式为：professions...

navigation的复数形式为：navigations...

aristocracy的复数形式为：aristocracies...

aqueduct的复数形式为：aqueducts...

founder的复数形式为：founders...