center of buoyancy vs centre of immersion

center of buoyancy and centre of immersion both are nouns.

Word	Noun	Adjective	Verb	Adverb
center of buoyancy	Yes	No	No	No
centre of immersion	Yes	No	No	No

As nouns, center of buoyancy and centre of immersion are synonyms defined as:

center of buoyancy and centre of immersion: (physics) the center of mass of the immersed part of ship or other floating object

Other synonyms of center of buoyancy include center of immersion, centre of buoyancy.

center of buoyancy (noun)	centre of immersion (noun)
(physics) the center of mass of the immersed part of ship or other floating object	(physics) the center of mass of the immersed part of ship or other floating object