cognoscente /ko-nyō-shenˈtā/

1. A person professing an expert knowledge, esp of works of art, music, literature, etc
2. A connoisseur

• jackknife
• jackknifed
• jackknifes
• jackknifing
• jackknives
• jackman
• jackmen
• Jack Mormon
• Jack-of-all-trades
• Jack of Lent
• Jack-o'-lantern
• jack pine
• jack pines
• jack plane
• jack planes
• jack plug
• jack plugs
• jackpot
• jackpots
• Jack-priest
• Jack-pudding
• jack rabbit
• jack rabbits
• jack-rafter
• jack-rafters