congruent 9 Associations

coincident (similar term) coinciding (similar term) identical (similar term) superposable (similar term) incongruent (antonym)

isotropic 9 Associations

isotropous identical (similar term) anisotropic (antonym)

isotropous 10 Associations

isotropic identical (similar term) anisotropic (antonym)

same 4 Associations

aforesaid (similar term) aforementioned (similar term) said (similar term) identical (similar term) selfsame (similar term) very (similar term) other (antonym)