horizontal union

16 LETTERS · STARTS WITH H

horizontal union is a valid 16-letter word worth 27 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

H4O1R1I1Z10O1N1T1A1L1U1N1I1O1N1

4 + 1 + 1 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 0 + 1 + 1 + 1 + 1 + 1 =27 PTS

DOUBLE WORD → 54TRIPLE WORD → 81

MEANING

What does horizontal union mean?