rhom·bo·he·dron 
(rŏm′bō-hēdrən)
(rŏm′bō-hēdrən)n. pl. rhom·bo·he·drons or rhom·bo·he·dra (-drə)
A prism with six faces, each a rhombus.
rhombohedron- propitiatory
- propitious
- propitiously
- propitiousness
- propjet
- proplastid
- propofol
- propolis
- proponent
- proportion
- proportionable
- proportionably
- proportional
- proportionality
- proportionally
- proportional representation
- proportionate
- proportionately
- proportionateness
- proportioner
- proportionment
- proposal
- propose
- proposer
- proposition