Pentecostalism is marked by several differences from other types of Christian denominations.
- Holy Spirit - There is an emphasis on the work of the Holy Spirit in the life of Christians that is not emphasized in other Christian contexts.
- Gifts of the Spirit - the Spiritual gifts, or charisms (miraculously given powers), are emphasized and encouraged as healthy aspects of a Christian life.
- Holy Spirit Baptism - Pentecostals believe that Holy Spirit Baptism (being filled by the Spirit) is necessary to salvation and glossolalia (speaking in tongues) is the initial evidence of such indwelling. Mainstream Christians believe that the Spirit is received either upon conversion or water baptism.
- Worship - Pentecostal worship is exuberant and lively. It is not confined to a predetermined "order of service".
- Holiness - Many, though not all, Pentecostals adhere to standards of holiness in dress and action. Pentecostals emphasize both inward and outward holiness.
- Water Baptism - Most Pentecostals believe that water baptism must be done by complete immersion in water rather than sprinkling. The baptismal formula is debated, "in Jesus' name" vs. "in the name of the Father, and of the Son, and of the Holy Spirit". They do not baptize infants. Baptists also believe in this form of baptism.