MICKLEST
Scrabble letter values: M3I1C3K5L1E1S1T1 = 16
Definition
MICKLEST is the superlative of MICKLE.
noun MICKLE: (often followed by `of') a large number or amount or extent.
Synonyms of MICKLE: batch, deal, flock, good_deal, great_deal, hatful, heap, lot