• goobye,
• goodbey,
• good-by,
• good-bye,
• foodby,
• voodby,
• boodby,
• hoodby,
• yoodby,
• toodby,
• giodby,
• gkodby,
• glodby,
• gpodby,
• g0odby,
• g9odby,
• goodyb,
• goodbye,
• ggodbye,
• goodey

• goodbye,
• godiva,
• Good-bye,
• godbee,
• Godby,
• good,
• godbey,
• good--bys,
• good-by.

The adjective form of the word "goodbye" is "goodbye".

The plural of the "goodby" can be the "goodbies".

The singular of the "goodby" can be the "goodby".