1. Quick and eager
   "an alacritous response to the invitation"

See also: alacrity, fast

• overtime period
• overtire
• overtly
• overtolerance
• overtone
• overtop
• overtrain
• overtrump
• overture
• Metternich
• mettle
• mettlesome
• mettlesomeness
• Metycaine
• meum
• Meuniere butter
• Meuse
• Meuse River
• Meuse-Argonne
• Meuse-Argonne operation
• Mevacor
• mew
• mew gull
• mewl
• mews