to work for free, to work without pay or other compensation / to work in vain, to work with no favorable end result

(archaic, grammar) any word that declines or conjugates / (archaic, grammar) more specifically, a verb

small-to-medium-sized enterprises, smaller companies

buyout (acquisition of a controlling interest)

entrepreneur

large company, conglomerate

"black company"; an exploitative firm that abuses employees or offers poor working conditions

corporation that takes care of all aspects of a product except for physical manufacturing

(dated) "company warrior": businessman who puts his all into work

public enterprise