Prophesy

1 Corinthians 14:1-3 (ESV Strong's)

1 Pursue love, and earnestly desire the spiritual gifts, especially that you may prophesy. 2 For one who speaks in a tongue speaks not to men but to God; for no one understands him, but he utters mysteries in the Spirit. 3 On the other hand, the one who prophesies speaks to people for their upbuilding and encouragement and consolation.

To speak under the inspiration of the Holy Spirit is to prophesy. Everyone speaks in a tongue which is their own. Some can speak to God in a tongue no one understands. When God speaks to us, He does so in a tongue we can understand. Talking to God is good, but listening and understanding God is the better thing. 

We all are prophets when we speak the word.