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

Crossword clues for Powerful combinations:

ONETWOS: Powerful combinations
VALENCES: Combining powers of atoms
ONETWO: Powerful combination
VALENCE: Element's combining power
VALENCE: Chemical indication of degree of combining power of an element.
VALENCE: Chemical combining power.
VALENCES: Degrees of elements' combining power
VALENCE: Element's degree of combining power