upsilon /ūp-sīˈlon, ŭp-, ūpˈsi- or upˈsi-/ or ypsilon /ip-sīˈlon or ipˈsi-/

1. The twentieth letter of the Greek alphabet (Υ, υ)
2. As a numeral υˈ = 400, ˌυ = 400000
3. A short-lived heavy subatomic particle produced when beryllium nuclei are bombarded with high-energy protons

• availabilities
• availability
• available
• available market
• available markets
• availableness
• availablenesses
• availably
• availe
• availed
• availes
• availful
• availing
• availingly
• avails
• aval
• avalanche
• avalanched
• avalanches
• avalanching
• avale
• avaled
• avales
• avaling
• avant