Correlative

Adjective

 * 1) mutually related; corresponding

Noun

 * 1) Either of two correlative things.
 * 2)  A pro-form; a non-personal pronominal, proadjectival, or proadverbal form, in Esperanto regularly formed, indicating which?, that, some, none, and every, as applied to people, things, type, place, manner, reason, time, or quantity, as: kiu ‘who’ (which person?), iu ‘someone’ (some person), tie ‘there’ (that place), ĉie ‘everywhere’ (all places), etc.

Thesaurus
accessory, accompanying, affinitive, agnate, akin, allied, analogical, analogous, appertaining, associated, associative, attendant, attending, cognate, coincident, collatable, collateral, combined, commensurable, commensurate, comparable, comparative, concomitant, concurrent, congeneric, congenerous, congenial, conjoint, connate, connatural, connected, connective, conspecific, corelated, corelational, corelative, correlated, correlational, coupled, en rapport, enate, fellow, joined, joint, linking, matchable, much at one, mutual, paired, parallel, pertaining, pertinent, proportionable, proportional, proportionate, referable, referring, relating, relational, relative, similar, simultaneous, sympathetic, twin