firm
/fɜːm/noun
A company run as a business partnership, or the name under which it does business.
In practice 'firm' clusters around professional services: law firms, accounting firms, consulting firms. A factory is more likely called a company.
Related words
agencyA business that provides a service or acts on behalf of other people or companies, or the office where it operates.companyA business organization that the law treats as its own person, able to hold property and take part in lawsuits under its own name.branchA woody limb that grows out from a tree's trunk and often splits into smaller parts.corporationAn organization that the law recognizes as its own entity, existing apart from its members and holding rights and debts separate from theirs.headquartersThe main office from which an organization is run.startupA young company, usually one built to grow quickly.