25So, when they had solemnly testified and spoken the word of the Lord, they started back to Jerusalem, and were preaching the gospel to many villages of the Samaritans.
Act_8:25 "solemnly testified" See note at Act_2:40.
▣ "and were preaching the gospel to many villages of the Samaritans" This shows the marked change of attitude on the part of the Apostles to the Samaritans.
It seems that "the word of the Lord" and "the gospel" are synonymous.