Year 1: /ur/ as ear and or

1. earth
2. early
3. search
4. learn
5. pearl
6. world
7. worm
8. worst
9. work
10. worked

Year 2: /ur/ as er and ir

1. herbs
2. person
3. fern
4. jerked
5. thermal
6. bird
7. girl
8. shirt
9. thirsty
10. skirt