SYNCHROSCOPES
Scrabble letter values: S1Y4N1C3H4R1O1S1C3O1P3E1S1 = 25
Definition
SYNCHROSCOPES is the plural of SYNCHROSCOPE.
noun SYNCHROSCOPE: an instrument that indicates whether two periodic motions are synchronous (especially an instrument that enables a pilot to synchronize the propellers of a plane that has two or more engines).
Synonyms of SYNCHROSCOPE: synchronoscope, synchronizer, synchroniser