1. bat_pat
2. ship_sheep
3. fan_van
4. bit_beat
5. back_bag
6. tick_thick
7. dose_those
8. pie_bye
9. sip_zip
10. leave_live
11. glue_blue
12. spring_string
13. climb_crime
14. star_stare
15. warm_warn
16. reader_leader
17. lighten_frighten
18. promote_promise