The difference between Extend and Project

When used as verbs, extend means to increase in extent, whereas project means to extend beyond a surface.

Project is also noun with the meaning: a planned endeavor, usually with a specific goal and accomplished in several steps or stages.

check bellow for the other definitions of Extend and Project

Extend as a verb (intransitive):

To increase in extent.
Extend as a verb (intransitive):

To possess a certain extent.
Extend as a verb (transitive):

To cause to increase in extent.
Extend as a verb (transitive):

To cause to last for a longer period of time.
Extend as a verb (transitive):

To straighten (a limb).
Extend as a verb:

To bestow; to offer; to impart; to apply.

Examples:

"to extend sympathy to the suffering"
Extend as a verb:

To increase in quantity by weakening or adulterating additions.

Examples:

"rfquotek G. P. Burnham"
Extend as a verb (UK, legal):

To value, as lands taken by a writ of extent in satisfaction of a debt; to assign by writ of extent.
Extend as a verb (object-oriented programming):

Of a class: to be an extension or subtype of, or to be based on, a prototype or a more abstract class.

Examples:

"The classes ''Person'' and ''Dog'' extend the class ''Animal''."

"synonyms: inherit"

Project as a noun:

A planned endeavor, usually with a specific goal and accomplished in several steps or stages.
Project as a noun (usually plural, US):

An urban low-income housing building.

Examples:

"Projects like Pruitt-Igoe were considered irreparably dangerous and demolished."
Project as a noun (dated):

An idle scheme; an impracticable design.

Examples:

"a man given to projects"
Project as a noun (obsolete):

A projectile.
Project as a noun (obsolete):

A projection.
Project as a noun (obsolete):

The place from which a thing projects.

Examples:

"rfquotek Holland"

Project as a verb (intransitive):

To extend beyond a surface.
Project as a verb (transitive):

To cast (an image or shadow) upon a surface; to throw or cast forward; to shoot forth.
Project as a verb (transitive):

To extend (a protrusion or appendage) outward.
Project as a verb (transitive):

To make plans for; to forecast.

Examples:

"The [[CEO]] is projecting the completion of the acquisition by April 2007."
Project as a verb (transitive, reflexive):

To present (oneself), to convey a certain impression, usually in a good way.
Project as a verb (transitive, psychology, psychoanalysis):

To assume qualities or mindsets in others based on one's own personality.
Project as a verb (cartography):

To change the projection (or coordinate system) of spatial data with another projection.