How to get the name of Wo word?

Word combinations:

1. Jiahe, hoe, green grass, grass insect, seedling, field, Tian He, firewood, wheat, wood, yellow grass, grass, grass

2, millet, ruihe, cereal, cornfield, glutinous rice, etc. Zhenhe, Heer, Hesu, Fenhe, Wanhe, Hezhu, Shouhe, Hehook, Hecha, Hequ, Wuhe

5, Heyang, Panicum Panicum, Hehui, Heba, Hepheasant, Heju, Qihe.