Nearness or proximity / Affiliation or similarity.

(law) The exclusive rights pertaining to the ownership and possession of a given piece of property.

Something that is owned. / A piece of real estate, such as a parcel of land. / Real estate; the business of selling houses. / The exclusive right of possessing, enjoying and disposing of a thing.

(obsolete) To invest with properties, or qualities. / (obsolete) To make a property of; to appropriate.

(transitive, of animals or plants) To cause to continue or multiply by generation, or successive production. / (transitive) To cause to spread to extend; to impel or continue forward in space.

A medicine which preserves or defends against disease; a preventive. / (US, specifically) A prophylactic condom. / (figuratively) Any device or mechanism intended to prevent harmful consequences.

Serving to prevent or protect against an undesired effect, especially disease or pregnancy

(transitive) To provide an impetus for motion or physical action, to cause to move in a certain direction; to drive forward.

A prediction that, by being voiced, causes itself to come true.

(organic chemistry) An aliphatic hydrocarbon, C₃H₈, a constituent of natural gas.