I1S1O1C3H4R1O1N1I1S1M3S1
19 points
ISOCHRONISMS is validvalid
ISOCHRONISM, [n]
ISOCHRONISM, the property of having the same duration; recurring at equal intervals [n]
ISOCHRONISM, [n]
ISOCHRONISM, the property of having the same duration; recurring at equal intervals [n]