What are the Differences between Purpose and Objective?

The two Words are synonymous, and can usually be used interchangably. "Purpose" is the more serious Word, although they are both fairly serious, and "objective" is often used by the military, so it can give that sort of feeling to your writing. If you are talking about a spy mission, objective would work better, and if you are talking about something religious, purpose would probably work better. - similarly, purpose could mean the reason for the undertaking while objective could be the main goal of the undertaking; what the person wants to achieve or accomplish through the undertaking. Ü