募集 is a noun/suru-verb meaning to recruit or solicit applications.
COMMON PATTERNS:
- 募集する (to recruit)
- 募集中 (now recruiting)
- 募集要項 (recruitment guidelines)
- アルバイト募集 (part-time job opening)
- 参加者募集 (recruiting participants)
DISTINCTION:
- 募集: seeking applicants (employer side)
- 応募: applying (applicant side)