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

Obviously pre-eminent

• sturdiest
• sturdily
• sturdiness
• sturdinesses
• sturdy
• sture
• sturgeon
• sturgeons
• Sturge-Weber syndrome
• Sturmabteilung
• Sturmer
• Sturmer Pippin
• Sturmers
• Sturm und Drang
• Sturnidae
• sturnine
• sturnoid
• sturnus
• sturnuses
• sturt
• sturted
• sturting
• sturts
• Sturt's desert pea
• stushie