equal in value, measure, force, effect, significance, etc.

His silence is equivalent to an admission of guilt.

corresponding in position, function, etc.

In some ways their prime minister is equivalent to our president.

Geometry . having the same extent, as a triangle and a square of equal area.

Mathematics . (of two sets) able to be placed in one-to-one correspondence.

Chemistry . having the same capacity to combine or react chemically.

something that is equivalent.

adjective

changeable , different , dissimilar , mismatched , unequal , unlike

noun

difference

adjective

agnate , akin , alike , analogous , carbon * , commensurate , comparable , convertible , copy , correlative , correspondent , corresponding , ditto * , duplicate , equal , even , homologous , identical , indistinguishable , interchangeable , like , of a kind , parallel , proportionate , reciprocal , same difference , substitute , synonymous , tantamount , same , similar , uniform

noun

carbon copy * , correspondent , dead ringer * , ditto , like , match , obverse , opposite , parallel , peer , reciprocal , same difference , spitting image * , substitute , twin , coequal , colleague , compeer , equal , fellow , alike , comparable , counterpart , equipollent , identical , parity , proportionate , same , similar , synonymous , tantamount