centroid vs centre of mass

centroid and centre of mass both are nouns.

Word	Noun	Adjective	Verb	Adverb
centroid	Yes	No	No	No
centre of mass	Yes	No	No	No

As nouns, centre of mass is a hypernym of centroid; that is, centre of mass is a word with a broader meaning than centroid:

centroid: the center of mass of an object of uniform density
centre of mass: point representing the mean position of the matter in a body

Other hypernyms of centroid include center of mass.

centroid (noun)	centre of mass (noun)
the center of mass of an object of uniform density	point representing the mean position of the matter in a body