also co-equal, "equal with another person or thing," late 14c.; see co- + equal (adj.). As a noun, "one who or that which is equal to another," 1570s. Related: Coequally, coequality.
coelacanth
coeliac
coelo-
coelomate
coeno-
coequal
coerce
coercion
coercive
coessential
coetaneous