Lead on and String along

Lead on verb - To lead away from a usual or proper course by offering some pleasure or advantage.

String along and lead on are semantically related in tease topic. In some cases you can use "String along" instead a verb "Lead on", when it comes to topics like entice, tempt, toy with, play with.

String along verb - To cause to believe what is untrue.

Lead on and string along are semantically related in play with topic. You can use "Lead on" instead a verb "String along".