General synonyms:
* Employ
* Engage
* Recruit
* Take on
* Secure
* Retain
* Contract
Synonyms for specific contexts:
* Rent: For renting a car, house, etc.
* Lease: For renting something for a longer period, like a property.
* Commission: For hiring someone to do a specific job, often creative work.
* Subcontract: For hiring another company to do part of a project.
* Enlist: For hiring someone to join the military.
Informal synonyms:
* Pick up: To hire someone for a job, usually temporary or casual.
* Get: To hire someone, often used in a more casual way.
The best synonym for "hire" will depend on the specific situation.