center of immersion vs centre of immersion

center of immersion and centre of immersion both are nouns.

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

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

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

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

center of immersion (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