Synonyms for Purpose:

adj.

objective (adjective)
destination.

n.

way. deliberately, designedly, intentionally. task, DO. ambition, planned, view, why. certain, decisiveness, firmness, purposefulness, resoluteness, resolution, strong, toughness, will, willpower, decidedness. contemplate, intend, mean, mind. aim (noun)
ambition, desire, destination, direction, dream, expectation, hope, idea, mission, proposal, prospect, scheme, scope, view.
course of action (noun)
scheme.
endeavor (noun)
action, adventure, aim, approach, assay, attempt, commitment, contract, deed, effort, endeavor, engagement, enterprise, essay, exploit, gambit, job, maneuver, performance, proceeding, production, project, undertaking, venture.
intention (noun)
design.
intention, meaning, aim (noun)
ambition, design, desire, destination, determination, direction, dream, drift, expectation, function, hope, idea, intent, mission, point, project, proposal, prospect, resolve, scheme, scope, view, will.
meaning (noun)
connotation, crux, definition, denotation, description, drift, explanation, gist, implication, indication, intent, interpretation, meaning, message, pith, point, relevance, significance, subject, tenor, thrust, topic, upshot.
perseverance (noun)
determination.
persistence, resolve (noun)
confidence, constancy, faith, firmness, resolution, tenacity.
purpose (noun)
aim, design, determination, function, intent, intention, propose, purport, resolve, role, use.
resolution (noun)
confidence, constancy, faith, persistence, tenacity.

v.

cognition (verb)
aim, propose, purport, resolve.
intend, set sights on (verb)
aim, contemplate, mean, mind, propose.

Other synonyms:

decisiveness, intend, purposefulness, resoluteness, willpower, decidedness. ambition, dream, hope, idea, toughness. resolution, why. contemplate, task. firmness, will. mean. view. plan
project.
purpose
mind, mission.
use
use.
Other relevant words:
ambition, certain, confidence, constancy, contemplate, decisiveness, deliberately, design, designedly, desire, destination, determination, direction, dream, expectation, faith, firmness, function, hope, idea, intend, intention, intentionally, mean, mind, mission, persistence, planned, proposal, propose, prospect, purport, purposefulness, resoluteness, resolution, resolve, role, scheme, scope, strong, task, tenacity, toughness, use, view, way, why, will, willpower, DO, decidedness.

Usage examples for purpose

  1. Did you come to Cairo on purpose to see me? – There was a King in Egypt by Norma Lorimer
  2. He knew their purpose – The Complete Project Gutenberg Works of George Meredith by George Meredith
  3. And with what purpose – The Red-Blooded Heroes of the Frontier by Edgar Beecher Bronson