Australian spelling vs metacentre

Australian spelling and metacentre both are nouns.

Word	Noun	Adjective	Verb	Adverb
Australian spelling	Yes	No	No	No
metacentre	Yes	No	No	No

Australian spelling (noun)	metacentre (noun)
English orthography used in Australia (characterized by 'analyse', 'centre', 'usable')	(shipbuilding) the point of intersection between two vertical lines, one line through the center of buoyancy of the hull of a ship in equilibrium and the other line through the center of buoyancy of the hull when the ship is inclined to one side; the distance of this intersection above the center of gravity is an indication of the stability of the ship