s 1 y 4 n 1 c 3 h 4 r 1 o 1 n 1 i 1 z 10 a 1 t 1 i 1 o 1 n 1 s 1
16 letters · 33 points in Scrabble
Meaning
noun the relation that exists when things occur at the same time
noun an adjustment that causes something to occur or recur in unison
noun coordinating by causing to indicate the same time