promotor：发起人；倡导者，赞助人

词根词缀：pro-前 + -mot-移动 + -or名词词尾

• flub
• fluctuate
• flue
• fluency
• fluent
• fluff
• flugelhorn
• fluid
• fluidity
• fluke
• flume
• flummery
• flummox
• flunk
• flunkey
• fluor
• fluorescent
• fluoride
• fluorine
• flurry
• flush
• fluster
• flute
• fluted
• flutist