Synonyms:1. business, barter, dealing. T
rade,
commerce,
traffic refer to the exchanging of commodities for other commodities or money. T
rade is the general word:
a brisk trade between the nations. C
ommerce applies to trade on a large scale and over an extensive area:
international commerce. T
raffic may refer to a particular kind of trade; but it usually suggests the travel, transportation, and activity associated with or incident to trade:
the opium traffic; heavy traffic on the railroads. 3. swap.
4. vocation, métier, employment, living, craft.
See occupation. 12. T
rade,
bargain,
barter,
sell refer to exchange or transfer of ownership for some kind of material consideration. T
rade conveys the general idea, but often means to exchange articles of more or less even value:
to trade with Argentina. B
argain suggests a somewhat extended period of coming to terms:
to bargain about the price of a horse. B
arter applies esp. to exchanging goods, wares, labor, etc., with no transfer of money for the transaction:
to barter wheat for machinery. S
ell implies transferring ownership, usually for a sum of money:
to sell a car. 
[treyd] 
noun, verb, trad⋅ed, trad⋅ing, adjective 