なれあい
馴れ合い collusion conspiracy illicit intercourse liaison

なれあう
馴れ合う to collude (with) to conspire (with) to establish a secret liaison (with) to make friends with to get along well with to become intimate (with opposite sex)

なれしたしむ
慣れ親しむ to become familiar with to get used to

なれそめ
馴れ初め start of a romance beginning of love

なれた
馴れた domesticated tame 慣れた experienced practiced familiar

なれなれしい
馴れ馴れしい 馴々しい over-familiar

なれる
馴れる to become domesticated to become tame to get too familiar with 慣れる to grow accustomed to