vol·un·teer·ism 
(vŏl′ən-tîrĭz′əm)
(vŏl′ən-tîrĭz′əm)n.
Use of or reliance on volunteers, especially to perform social or educational work in communities.
- semiprecious stone
- semiprivate
- semipro
- semiprofessional
- semiprofessionally
- semipublic
- semipublicly
- semiquaver
- semiretired
- semiretirement
- semirigid
- semiround
- semirural
- semiskilled
- semisoft
- semisolid
- semispherical
- semisub
- semisubmersible
- semisweet
- semisynthetic
- Semite
- semiterrestrial
- Semitic
- Semiticist