LANTHANIDES
Scrabble letter values: L1A1N1T1H4A1N1I1D2E1S1 = 15
Definition
LANTHANIDES is the plural of LANTHANIDE.
noun LANTHANIDE: any element of the lanthanide series (atomic numbers 57 through 71).
Synonyms of LANTHANIDE: rare_earth, rare-earth_element, lanthanoid, lanthanon