sulphide or (US) sulfide /sulˈfīd/

1. A compound of an element or radical with sulphur
2. A salt of hydrosulphuric acid

• under plain cover
• underplant
• underplanted
• underplanting
• underplants
• underplay
• underplayed
• underplaying
• underplays
• underplot
• underplots
• underpopulated
• under-power
• underpowered
• under-powers
• underpraise
• underpraised
• underpraises
• underpraising
• underpreparation
• underprepared
• underpriced
• underprise
• underprivileged
• underprize