- A fold in rocks in which the rock layers dip inward from both sides toward the axis.向斜：岩石层从两侧向中轴倾斜的岩石中的褶皱
- Back-formation from synclinal 源自 synclinal的逆构词
- Yoopers
- yoo–hoo
- Yorba Linda
- yore
- yores
- York
- York College
- York College of Pennsylvania
- York College of Pennsylvania
- Yorke Peninsula
- Yorke Peninsula
- York River
- Yorkshire
- Yorkshire pudding
- Yorkshires
- Yorkshire terrier
- York Technical College
- Yorkton
- Yorktown
- Yoruba
- Yorubas
- Yosemite Valley
- Yoshihito
- Yoshkar-Ola
- yotta-