genuflection (n.)

• bend
• bob
• bow
• crouch
• curtsy
• duck
• homage
• inclination
• kneeling
• kowtow
• nod
• obeisance
• obsequiousness
• prostration
• reverence
• salaam
• salutation
• salute
• scrape
• servility
• squat
• stoop
• submission
• submissiveness
• supination