Freethought
Freethought is the view of a freethinker. A freethinker has been defined by the Freedom From Religion Foundation (references) as "a person who forms opinions about religions on the basis of reason, independently of tradition, authority, or established belief. Freethinkers include atheists, agnostics and rationalists. No one can be a freethinker who demands conformity to a bible, creed, or messiah. To the freethinker, revelation and faith are invalid, and orthodoxy is no guarantee of truth."
There are strong ties between skepticism, secular humanism and freethought, but like atheist, these words are not interchangable with freethinker. However, a precise definition is at best difficult, as the word freethought is defined differently by different persons. For example, in principle, one could be a freethinker and simultaneously believe in the existence of a God, provided the basis for that belief was rational argument, rather than arguments from authority, tradition, or scripture. Some atheist freethinkers, however, believing that there are no rational arguments for deism or [[theism],] are reluctant to accept the claims of deists or theists to be freethinkers.
The new term bright has been applied to those of freethinking mentality, who stress a naturalistic as opposed to supernatural worldview. It remains to be seen if this new word will catch.