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

Obviously pre-eminent

• Xylonite®
• Xylophaga
• xylophagan
• xylophagans
• xylophage
• xylophages
• xylophagous
• xylophilous
• xylophone
• xylophones
• xylophonic
• xylophonist
• xylophonists
• Xylopia
• xylopyrography
• xylorimba
• xylorimbas
• xylose
• xyloses
• xylotomous
• xylotypographic
• xylotypography
• xylyl
• xylyls
• Xyridaceae