Lying in wait and Set upon

Lying in wait adjective - Waiting in concealment; in ambush.

Set upon and lying in wait are semantically related. in intercept topic. In some cases you can use "Set upon" instead a verb phrase "Lying in wait".

Set upon verb - Assail or attack on all sides: "The zebra was beset by leopards".

Lying in wait and set upon are semantically related. Sometimes you can replace phrase "Lying in wait" with "Set upon", this terms are similar.