Ballpoint pen and Ball-point pen

Ballpoint pen noun - A pen that has a small metal ball as the point of transfer of ink to paper.

Ball-point pen and ballpoint pen are semantically related. In some cases you can replace phrase "Ball-point pen" with "Ballpoint pen", this phrases are similar.

Ballpoint pen and ball-point pen are semantically related. You can use "Ballpoint pen" instead a noun phrase "Ball-point pen".