equilibrist
Synonym discussion
Sense: noun/1
Equilibrist highlights balance as the center of the act. An acrobat may also jump, flip, or twist through the air, so it is a broader word for a physical performer. Tightrope walker is narrower: it fits someone who works specifically on a rope or wire, while an equilibrist may balance on chairs, beams, rolling objects, or a unicycle as well. Performer is much wider and tells you almost nothing about the skill involved. If a festival program says an equilibrist will appear, you expect a balance act. If it says an acrobat will appear, the routine could include tumbling, aerial tricks, or balancing.
Etymology
Equilibrist came into English through French equilibriste and ultimately goes back to Latin roots meaning 'level' and 'balance'. The word has long been used for someone whose skill depends on keeping steady balance during a performance.
First known use
1760
1760, in the meaning defined above