Words similar to volunteer

Example sentences for: volunteer

How can you use “volunteer” in a sentence? Here are some example sentences to help you improve your vocabulary:

Russia has shelved its longstanding plan to switch to a volunteer army because it can't pay enough to recruit soldiers.
Not knowing her, I cannot tell what they might be--reading, music, appreciation of nature, volunteer activity, church, or whatever is closest to her.
The CASA program is a volunteer organization of people who assist and advocate for the rights of individual children in foster care.
Corporations are involved in a number of projects that make a huge impact on our institution, including program underwriting, marketing sponsorships, inkind donations, volunteer activities, etc.
Would universities and corporations really let their people volunteer?