Be hard on the heels of and Hang out

Hang out and be hard on the heels of are semantically related. In some cases you can use "Hang out" instead a verb phrase "Be hard on the heels of".

Hang out verb - Spend time in a certain location or with certain people.

Be hard on the heels of and hang out are semantically related. You can use "Be hard on the heels of" instead a verb "Hang out".