Yay for self-research!
Calvinism is a reformed concept, but the reformed Church encompasses a lot more than just the basic
five points. There are theological distinctions (the sovereignty of God, the depravity of man, the purpose of communion and baptism, the second coming of Christ, etc), but there are also liturgical and hierarchical differences: most reformed churches place a focus on the worship service as God meeting with man, through the scripture and the sacraments. They do not embrace the "pep-talk" or stage show stylistics that have shown up in modern churches. Although American reformed denominations will consider themselves a part of the American movement of Evangelicalism, most reject the individualistic self-centered philosophy that has invaded modern Christianity. Consider these statements "Smile: Jesus Loves You" or "Have you spoken to God today?" They seem like pretty simple phrases, but within them is held a theological premise and philosophical attitude that could be dangerous or outright false.
Calvinism is theology, but the Reformed Church is defined by theological issues beyond Calvinism as well as the major questions of human life and Christian living.
note: the article that Vudu linked is a specific denomination known as the "Christian Reformed Church," of which I am not a member. Many other denominations, as PartyBear insinuated, are considered "Reformed" since it is not a denomination in and of itself. There is such a thing as Reformed Baptists, for instance - most Presbyterians identify themselves as Reformed and were leaders in the movement in America. The Puritans were reformed (and very Calvinistic), and so forth. Try this
link instead. Also, the historic reformers created five latin phrases known as
The Five Solas that help sum up some key distinctions between Reformed Christianity and Roman Catholicism. These solas are debated even within Protestantism today, but much less so than the five points of Calvinism.