horizontal mobility

19 LETTERS · STARTS WITH H

horizontal mobility is a valid 19-letter word worth 37 points in Scrabble and 40 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

H4O1R1I1Z10O1N1T1A1L1M3O1B3I1L1I1T1Y4

4 + 1 + 1 + 1 + 10 + 1 + 1 + 1 + 1 + 1 + 0 + 3 + 1 + 3 + 1 + 1 + 1 + 1 + 4 =37 PTS

DOUBLE WORD → 74TRIPLE WORD → 111

MEANING

What does horizontal mobility mean?