Z10E1P3T1O1S1E1C3O1N1D2S1
26 points
ZEPTOSECONDS is validvalid
ZEPTOSECOND, one part in one short scale sextillion of a second [n]
ZEPTOSECOND, a 10 to the -21 part of a second [n]
ZEPTOSECOND, one part in one short scale sextillion of a second [n]
ZEPTOSECOND, a 10 to the -21 part of a second [n]