trade; deal
● Commerce
● Transaction
● Network
● Transfer
● Swap
● Change
● Shuffle
● Barter
● Interdependence
● Interchange
● Conversion
● Commutation
● Reciprocity
● Revision
● Correspondence
● Traffic
● Substitution
● Shift
● Switch
● Reciprocation
● Truck
● Rearrangement
● Replacement
● Quid pro quo
● Tit for tat
● Dealing
● Shuffling
● Interrelation
● Castling
● Transposition
● Buying and selling
● Supplantment
● Stagnation
● Castlings
● Rook