facile princeps /fasˈi-lē prinˈseps or fakˈi-le prinˈkeps/

Obviously pre-eminent

• aculeate
• aculeated
• aculeates
• aculei
• aculeus
• acumen
• acumens
• acuminate
• acuminated
• acuminates
• acuminating
• acumination
• acuminations
• archaeopteryxes
• Archaeornithes
• archaeozoologist
• archaeozoologists
• archaeozoology
• arthroscope
• arthroscopes
• arthroscopic
• arthroscopies
• arthroscopy
• arthroses
• arthrosis