Correlative

Part of speech: noun (n.)

1. One who, or that which, stands in a reciprocal relation, or is correlated, to some other person or thing. Locke. Spiritual things and spiritual men are correlatives. Spelman.

2. The antecedent of a pronoun.

Part of speech: adjective (a.)

Having or indicating a reciprocal relation. Father and son, prince and subject, stranger and citizen, are correlative terms. Hume.