Senary is an adjective that means involving or consisting of six things. There are several synonyms for the word senary such as sextuple, hexagonal, sixfold, six-part, six-piece, and six-sided. Sextuple refers to six times greater or consisting of six parts similar to the original word senary. Hexagonal means having six sides like a hexagon. Sixfold is another synonym for senary, describing six times as much or six times the original size. Six-part refers to dividing something into six parts, while six-piece suggests the same meaning but specifically for objects. And six-sided refers to anything that has six sides or faces.