Various terms are used in the Bible to describe the messages given by the prophets: counsel (Isaiah 44:26); Lord’s message (Haggai 1:13); prophecy, or prophecies (2 Chronicles 9:29; 15:8; 1 Corinthians 13:8); testimonies (1 Kings 2:3; 2 Kings 11:12; 17:15; 23:3; also many verses in Psalm 119); and Word of God (1 Sam. 9:27; 1 Kings 12:22). MOL 12.2
Each term, though easily inter-changeable, emphasizes a particular aspect of God’s communication system. “Testimonies,” for example, suggests “messages.” The thought included in “the testimony of Jesus” (Revelation 12:17 and 19:10) is that the messages or will of Jesus are revealed when a prophet speaks or writes. MOL 12.3