mastoiditis/mastoyʹdietis/ noun

• julep
• Julian calendar
• julienne
• juliet cap
• July
• jumble
• jumble sale
• jumbo
• jumbo jet
• jumbuck
• jump
• jump at something
• jump bail
• jump/climb on the bandwagon
• jump down somebody's throat
• jumped-up
• jumper
• jumping bean
• jumping jack
• jumping-off place
• jumping-off point
• jump-jet
• jump jockey
• jump leads
• jump-off