Corp., Inc., Corporation, Incorporated: used to denote corporations (public or otherwise). These are the only terms universally accepted by all 51 corporation chartering jurisdictions in the United States. However, in some states other suffixes may be used to identify a corporation, such as Ltd., Co./Company, or the Italian term S.p.A. (in Connecticut; see under Italy). Some states that allow the use of "Company" prohibit the use of "and Company", "and Co.", "& Company" or "& Co.". In most states sole proprietorships and partnerships may register a fictitious "doing business as" name with the word "Company" in it. For a full list of allowed designations by state, see the table below.
If you need financial assistance, a commercial loan through a bank is a good starting point, although these are often difficult to secure. If you are unable to take out a bank loan, you can apply for a small business loan through the Small Business Administration (SBA) or an alternative lender. [See related story: Best Alternative Small Business Loans]

Kansas (except for banks) "association", "church", "college", "company", "corporation", "club", "foundation", "fund", "incorporated", "institute", "society", "union", "university", "syndicate" or "limited", or one of the abbreviations "co.", "corp.", "inc.", "ltd.", or words or abbreviations of like import in other languages if they are written in Roman characters or letters § 17-6002 Kansas Statutes

Idaho	"corporation", "incorporated", "company", "limited", or the abbreviation "corp.", "inc.", "co.", or "ltd.", or words or abbreviations of like import in another language; provided however, that if the word "company" or its abbreviation is used it shall not be immediately preceded by the word "and" or by an abbreviation of or symbol representing the word "and"	§ 30-1-401 Idaho Statutes

Unltd or Ultd (Unlimited/無限公司): similar to a limited liability company (Ltd) but whose members or shareholders do not benefit from limited liability should the company ever go into formal liquidation. It is not a requirement under company law to add or state the word or designation Unlimited (無限公司) or its abbreviations (Unltd or Ultd) at the ending of its legal company name, and most unlimited companies do not.