• grubble,
• probbily,
• frubbily,
• vrubbily,
• brubbily,
• hrubbily,
• yrubbily,
• trubbily,
• geubbily,
• gdubbily,
• gfubbily,
• gtubbily,
• g5ubbily,
• g4ubbily,
• grubily,
• gurbbily,
• grubbaly,
• grubly,
• grumblly,
• grabbily

• graybill,
• rubble,
• grubbier,
• grubby,
• grabill,
• Grubbing.

The adjective form of the word "grubbily" is "grubby".

The plural form of "grubbily" is still "grubbily" as it is an adverb and does not typically have a plural form.

The singular form of the word "grubbily" is "grubbiness"