Happen upon and Run into

Happen upon verb - To come upon face-to-face or as if face-to-face.

Run into and happen upon are semantically related in lay hands on topic. In some cases you can use "Run into" instead a verb "Happen upon".

Run into verb - Collide violently with an obstacle.

Happen upon and run into are semantically related in lay hands on topic. You can use "Happen upon" instead a verb "Run into".