C3O1L1U1M3B3I1U1M3S1
18 points
COLUMBIUMS is validvalid
COLUMBIUM, [n]
COLUMBIUM, a rare element of the vanadium group, now more commonly called niobium [n]
COLUMBIUM, [n]
COLUMBIUM, a rare element of the vanadium group, now more commonly called niobium [n]