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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Rotterdam's river. 4 letters:

MAAS: Rotterdam's river.
MAAS: River of Rotterdam
MAAS: Nieuwe ___, Rotterdam's river
RHINE: Rotterdam's river
YSSEL: River above Rotterdam.
RHINE: River near Rotterdam