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

• sloops
• sloosh
• slooshed
• slooshes
• slooshing
• sloot
• slop
• slop basin
• slop basins
• slop bowl
• slop bowls
• slop bucket
• slop buckets
• slop-built
• slop-chest
• slop-chests
• slop-clothing
• slope
• slope arms
• sloped
• slope off
• slopes
• slopewise
• slopier
• slopiest