dec·a·he·dron 
(dĕk′ə-hēdrən)
(dĕk′ə-hēdrən)n. pl. dec·a·he·drons or dec·a·he·dra (-drə)
A polyhedron with ten faces.
dec′a·hedral adj.
decahedron- unpopularity
- unpracticed
- unprecedented
- unprecedentedly
- unpredictability
- unpredictable
- unpredictably
- unprejudiced
- unpremeditated
- unprepared
- unpreparedly
- unpreparedness
- unprepossessing
- unpretending
- unpretentious
- unpretentiously
- unpretentiousness
- unpriced
- unprincipled
- unprintable
- unproductive
- unproductively
- unproductiveness
- unprofessional
- unprofessionalism