supportside

noun
UK /səˈpɔːtsaɪd/
US /səˈpɔːrtsaɪd/

The side of something that holds it up or helps it.

The supportside of the shelf is the part that keeps it from falling down.


OTHER MEANINGS

2. The side of a team or group that gives help and encouragement.

The coach stood on the supportside of the field, cheering for every player.

3. The part of a structure that carries the most weight.

Engineers checked the supportside of the bridge for cracks.

4. A person or group that backs up another person's idea.

She found a supportside among her classmates for the new club.