ro'shah (Hebrew #7222)
the head
KJV usage: head(-stone).
Pronounce: ro-shaw'
Origin: feminine of 7218
'eben (Hebrew #68)
a stone
KJV usage: + carbuncle, + mason, + plummet, (chalk-, hail-, head-, sling-)stone(-ny), (divers) weight(-s).
Pronounce: eh'-ben
Origin: from the root of 1129 through the meaning to build