Answer:

whitest

Answer	Crossword Clue
WHITEST	Most snowy.
WHITEST	Palest.
WHITEST	Most pallid

WHITEST	Like ideal teeth
WHITEST	Like the best-looking teeth
WHITEST	Most desirable, as teeth go

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.