interest, conflict, conflict of interest, legal interest, special concern, stake.
In plural; Those that control trade
combine, cartel, combination in restraint of trade, companies (with interlocking directorates), syndicate; see also business 4, monopoly.
"vested interest." YourDictionary, n.d. Web. 08 August 2018. <http://thesaurus.yourdictionary.com/vested-interest>.
vested interest. (n.d.). Retrieved August 08th, 2018, from http://thesaurus.yourdictionary.com/vested-interest