• wholegrain,
• qhole-grain,
• ahole-grain,
• shole-grain,
• ehole-grain,
• 3hole-grain,
• 2hole-grain,
• wgole-grain,
• wbole-grain,
• wnole-grain,
• wjole-grain,
• wuole-grain,
• wyole-grain,
• while-grain,
• whkle-grain,
• whlle-grain,
• whple-grain,
• wh0le-grain,
• wh9le-grain,
• whoke-grain

The adjective form of the word "whole-grain" is "whole-grain". The term itself already functions as an adjective to describe grains that contain the entire grain kernel, including the bran, germ, and endosperm.

The plural form of "whole-grain" is "whole-grains".

The singular form of the word "whole-grain" is "whole grain".