Verses with the word tower in the New Testament (4 verses):

Matthew 21:33
Hear another parable: There was a certain householder, which planted a vineyard, and hedged it round about, and digged a winepress in it, and built a tower, and let it out to husbandmen, and went into a far country:

Mark 12:1
And he began to speak unto them by parables. A certain man planted a vineyard, and set an hedge about it, and digged a place for the winefat, and built a tower, and let it out to husbandmen, and went into a far country.

Luke 13:4
Or those eighteen, upon whom the tower in Siloam fell, and slew them, think ye that they were sinners above all men that dwelt in Jerusalem?

Luke 14:28
For which of you, intending to build a tower, sitteth not down first, and counteth the cost, whether he have sufficient to finish it?