heptagonal Synonyms

billion pentahedral rhombohedral septangular septuple sevenfold sexennial sixfold trapezohedral trapezoid 7-membered jillion dodecagonal septagonal heptahedral oxygonal octahedral octagonal centenary decagonal decennary dodecahedral dozen heptagon heptamerous heptangular hexagonal hexahedral hexangular icosahedral kilo octad hexadic