The act of selling
sale, auction, bartering, trading, vending, auctioning, transfer, transferring, commercial transaction, transacting, disposal, scoring, disposing, merchandising.
Antonyms buying*, acquiring, purchasing.
The occupation of selling
commercial enterprise, traffic, merchandising; see business 1.
"selling." YourDictionary, n.d. Web. 15 August 2018. <http://thesaurus.yourdictionary.com/SELLING>.
selling. (n.d.). Retrieved August 15th, 2018, from http://thesaurus.yourdictionary.com/SELLING