asymmetric,
asymmetrical irregular in shape or outline; "asymmetrical features"; "a dress with a crooked hemline"
parallel being everywhere equidistant and not intersecting; "parallel lines never converge"; "concentric circles are parallel"; "dancers in two parallel rows"
regular in accord with regular practice or procedure; "took his regular morning walk"; "her regular bedtime"
even,
regular equal in degree or extent or amount; or equally matched or balanced; "even amounts of butter and sugar"; "on even terms"; "it was a fifty-fifty (or even) split"; "had a fifty-fifty (or even) chance"; "an even fight"
interchangeable (mathematics, logic) such that the arguments or roles can be interchanged; "the arguments of the symmetric relation, `is a sister of,' are interchangeable"
isosceles (of a triangle) having two sides of equal length
balanced being in a state of proper equilibrium; "the carefully balanced seesaw"; "a properly balanced symphony orchestra"; "a balanced assessment of intellectual and cultural history"; "a balanced blend of whiskeys"; "the educated man shows a balanced development of all his powers"
