vigia /vi-jēˈə or vi-hhēˈä/

A danger warning on a chart

• grey knights
• greylag
• greylag geese
• greylag goose
• greylags
• grey literature
• greyly
• grey mare
• grey market
• grey markets
• grey matter
• grey mullet
• greyness
• greynesses
• grey-out
• grey-outs
• grey owl
• grey owls
• grey parrot
• grey parrots
• greys
• greyscale
• greyscales
• grey seal
• grey seals