While "volunteerism" and "voluntarism" are both words, they are not as commonly used or preferred as "volunteering."
Here's a breakdown:
* Volunteering: Refers to the act of doing something willingly and without pay. It's the most common and preferred term.
* Volunteerism: Refers to the philosophy or practice of volunteering. It's a more formal and less common term.
* Voluntarism: Refers to the principle or belief that actions should be voluntary and not forced. It's a philosophical term and not directly related to the act of volunteering.
Therefore, "volunteering" is the most common and preferred spelling when referring to the act of doing something willingly and without pay.