Oghres

• ogres: giants who eat humans → from the Latin Orcus, a god of the underworld

• ochre: a yellow or red pigment, used for colouring walls, etc

• ogham: ancient Irish lapidary alphabet consisting of inscribed notches for vowels and lines for consonants, and used for writing Old Irish inscriptions, chiefly on the edges of memorial stones, from the fifth to the early seventh century
• Ogham