Goodbye vs. Godspeed

Goodbyeinterjection

; a formula used to another person or persons when the speaker, writer, or person addressed is departing.

Godspeednoun

Success; prosperous journeying; - a contraction of the phrase, "God speed you."

‘Receive him not into house, neither bid him God speed.’;

Goodbyenoun

An utterance of goodbye, the wishing of farewell to someone.

‘John gave Rebecca a goodbye to wish her luck on her holiday.’;

Godspeednoun

a successful journey;

‘they wished him Godspeed’;

Goodbyeverb

To say goodbye; to wish somebody farewell on parting.

Goodbyenoun

a farewell remark;

‘they said their good-byes’;