homothecy vs homothety

homothecy and homothety both are nouns.

Word	Noun	Adjective	Verb	Adverb
homothecy	Yes	No	No	No
homothety	Yes	No	No	No

As nouns, homothecy and homothety are synonyms defined as:

homothecy and homothety: (mathematics) an isotropic scaling transformation of an affine space with a single fixed point.

homothecy (noun)	homothety (noun)
(mathematics) an isotropic scaling transformation of an affine space with a single fixed point.	(mathematics) an isotropic scaling transformation of an affine space with a single fixed point.