Nouns

(n)isometrythe growth rates in different parts of a growing organism are the same
(n)isometrya one-to-one mapping of one metric space into another metric space that preserves the distances between each pair of points“the isometries of the cube”
(n)isometryequality of elevation above sea level
(n)isometryequality of measure (e.g., equality of height above sea level or equality of loudness etc.)