pitch·stone 
(pĭchstōn′)
(pĭchstōn′)n.
Any of various volcanic glasses distinguished by their dull pitchlike luster.
[Translation of German Pechstein.]
- unreasonably
- unreasoned
- unreasoning
- unreasoningly
- unreconstructed
- unreel
- unreeve
- unreflecting
- unreflectingly
- unreflective
- unreflectively
- unregenerable
- unregeneracy
- unregenerate
- unregenerately
- unrehearsed
- unrelenting
- unrelentingly
- unreliability
- unreliable
- unreliableness
- unreliably
- unrelieved
- unrelievedly
- unreligious