Restricted words vary by state and commonly include terms associated with regulated industries, government agencies, or licensed professions. Some words require approval or documentation from another agency before the state will accept the name.

Swyft Filings provides business-name resources and performs name checks as part of its filing process. A state name check focuses on whether a proposed entity name can be accepted under that state's naming rules; it does not determine whether the name is clear from every trademark, branding, domain-name, or marketplace conflict.