having a likeness or resemblance, esp. in a general way

two similar houses.

Geometry . (of figures) having the same shape; having corresponding sides proportional and corresponding angles equal

similar triangles.

Mathematics . (of two square matrices) related by means of a similarity transformation.

adjective

alien , different , dissimilar , opposite , unalike , unlike

adjective

agnate , akin , allied , analogous , coincident , coincidental , coinciding , collateral , companion , comparable , complementary , congruent , congruous , consonant , consubstantial , correlative , corresponding , homogeneous , identical , in agreement , kin , kindred , like , matching , much the same , parallel , reciprocal , related , resembling , same , twin , uniform , alike , equivalent , analogical , cognate , consistent , duplicate , harmonious , homologous , homonymous , indistinguishable , resemblance , semblable , semblance , synonymous