Answer:

ogam

Answer	Crossword Clue
OGAM	Ancient Irish dialect.
OGAM	Old Irish writing system.
OGAM	Early Irish alphabet.

OGAM	Old Irish alphabetic system.
OGAM	Early Irish writing system.
OGAM	Irish writing
OGAM	Old Irish alphabet
OGAM	Irish script
OGAM	Old Irish script
OGAM	Old Irish writing
OGAM	Irish alphabet: Var.

OGAM	Early Irish writing system
OGAM	Old Irish alphabet: Var.

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.