yachtsman or yachtswomannoun (pl yachtsmen yachtswomen)

• quinquagenarian
• Quinquagesima
• quinque-
• quinquennia
• quinquennial
• quinquennium
• quinquereme
• quinquevalent
• quinsy
• quint
• quintain
• quintal
• quinte
• quintessence
• quintet
• quintillion
• quintuple
• quintuplet
• quintuplicate
• quip
• quire
• quirk
• quirt
• quisling
• quit