Pentecostalism vs. Protestantism: What's the Difference?

Pentecostalism and Protestantism Definitions
Pentecostalism
Of, relating to, or occurring at Pentecost.
Protestantism
Adherence to the religion and beliefs of a Protestant church.
Pentecostalism
Of, relating to, or being any of various Christian religious congregations whose members seek to be filled with the Holy Spirit, in emulation of the Apostles at Pentecost.
Protestantism
The religion and religious beliefs fostered by the Protestant movement.
Pentecostalism
A member of a Pentecostal congregation.
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Protestantism
Protestants considered as a group.
Pentecostalism
The principles and practices of Pentecostal religious groups; characterized by religious excitement and talking in tongues
Protestantism
The quality or state of being protestant, especially against the Roman Catholic Church; the principles or religion of the Protestants.
Protestantism
The theological system of any of the churches of western Christendom that separated from the Roman Catholic Church during the Reformation