• berl green,
• berylgreen,
• beril green,
• berry-green,
• beryal-green,
• berral-green,
• berilg-green,
• berm-green,
• beral-green

The adjective form of "beryl-green" is "beryl-green". The word itself functions as both a noun and an adjective.

The plural form of "beryl-green" remains the same, as it is an adjective describing a color.

The singular form of the word "beryl-green" is "beryl-green". The word does not change in the singular form.