proponent
/prəʊˈpəʊnənt/noun
- a person who advocates a theory, proposal, or project（理论、倡议、项目的）提议者, 建议者; 支持者：
a collection of essays by both critics and proponents of graphology.
一本兼有批评家和倡导者所写的关于笔迹学的论文集。
词源
late 16th cent.: from Latin proponent- 'putting forth'，from the verb proponere （see PROPOUND）.