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Synonyms for Swash (same or very similar meaning)

WordNet sense 1 (dash a liquid upon or against):
plash, spatter, splash, splatter, splosh

WordNet sense 2 (show off):
blow, bluster, boast, brag, gas, gasconade, tout, vaunt, shoot a line

WordNet sense 3 (act in an arrogant, overly self-assured, or conceited manner):
swagger


From the ODE community, based on WordNetadd/edit