1) Arranged in groups of two 2) Arranged in twos 3) Bigeminal 4) Coupled 5) Formed twosomes 6) Going hand in hand 7) In partnership with 8) Like Ark animals 9) Like chromosomes 10) Like dance-contest entrants 11) Like matched socks 12) Like socks in a drawer 13) Like socks, hopefully 14) Like sorted socks Found on https://www.crosswordclues.com/clue/paired