It's all semantics and how the words have been watered down through the years.
Classic Liberalism is something to aspire to, and what many people here and other places mean when they say "Conservative".
Classical liberalism (also known as traditional liberalism[1] and laissez-faire liberalism,[2] or, in much of the world, simply called liberalism) is a doctrine stressing individual freedom and limited government. This includes the importance of human rationality, individual property rights, natural rights, the protection of civil liberties, constitutional limitations of government, free markets, and individual freedom from restraint as exemplified in the writings of Adam Smith, John Stuart Mill,[3] Montesquieu, Voltaire,[4] Thomas Paine and others. As such, it is seen as the fusion of economic liberalism with political liberalism.[2] The "normative core" of classical liberalism is the idea that laissez-faire economics will bring about a spontaneous order or invisible hand that benefits the society,[5] though it does not necessarily oppose the state's provision of a few basic public goods.[6]
http://en.wikipedia.org/wiki/Classical_liberalism
Conservative is less able to be defined.
Conservatism is a term used to describe political philosophies that favor tradition and gradual change, where tradition refers to religious, cultural, or nationally defined beliefs and customs. The term is derived from the Latin, con-" (together) and "servare (to keep). Since different cultures have different established values, conservatives in different cultures have differing goals. Some conservatives seek to preserve the status quo or to reform society slowly, while others seek to return to the values of an earlier time, the status quo ante.
Conservatism as a political philosophy is difficult to define, encompassing numerous movements, and conservatives sometimes disagree about which parts of a culture are most worthy of preservation. Thus religious conservatives may be at odds with nationalist conservatives. There may be contradictions between alternative conceptions of conservatism as the ideology of preserving the past, and the contemporary worldwide conception of conservatism as a right-wing political stance.
You currently do not have a Liberal Party (Democrat) and a Conservative Party (Republican).
There is a deeply socialist party (Democrat) and a slightly less socialist party (Republican)