“Goodbye” is the most common phrase because it’s correct as both a noun and adjective. We might also find the hyphenated form of “good-bye” is used in some case… See more

“Goodbye” is most commonly written as one word. We can use it as both a noun and an adjective in this form. As a noun, it is used to say goodbye to someone. As an adjective, … See more

“Good bye” is never correct as two words. It’s such a common phrase that many people have chosen to group it together as one word, and that’s the form that’s stuck as the lang… See more

“Good-bye” can be hyphenated in specific circumstances. If it is used as an adjective before a noun, we can hyphenate the two words to show how the modification takes place. How… See more