horizontal axis

15 LETTERS · STARTS WITH H

horizontal axis is a valid 15-letter word worth 33 points in Scrabble and 34 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

H4O1R1I1Z10O1N1T1A1L1A1X8I1S1

4 + 1 + 1 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 8 + 1 + 1 =33 PTS

DOUBLE WORD → 66TRIPLE WORD → 99

MEANING

What does horizontal axis mean?