Home › Words › R › rashguardrashguardrashguard · noun — synonym of rash vest (“a close-fitting garment often worn while surfing or during other water sports under a wetsuit to prevent chafing and provide UV protection or extra warmth”).Definition from Wiktionary (CC BY-SA 3.0).Among words judged in Lexicurio's Arena, rashguard ranks #16,998 of 43,042 for Qualifying.EtymologyFrom rash + guard.nounSynonym of rash vest (“a close-fitting garment often worn while surfing or during other water sports under a wetsuit to prevent chafing and provide UV protection or extra warmth”).Definitions & examples from Wiktionary (CC BY-SA 3.0).