I1N1T1E1R1C3A1L1A1T1E1S1
14 points
INTERCALATES is validvalid
INTERCALATE, to insert between regular or preexisting elements of a list [v]
INTERCALATE, to insert (as a day) in a calendar [v]
INTERCALATE, to insert between regular or preexisting elements of a list [v]
INTERCALATE, to insert (as a day) in a calendar [v]