Difference between Thumbtack and Pushpin

What is the difference between Thumbtack and Pushpin?

Thumbtack as a noun is a small nail-like tack with a slightly rounded head that can be pressed into place with light pressure from the thumb; used for hanging light articles on a wall or noticeboard while Pushpin as a noun is a thumbtack

We hope you now know whether to use Thumbtack or Pushpin in your sentence.