I'm pretty sure that it's ellos
Answer:
Tremendo (1st row, 1st letter, down)
Meditar (2nd row, 3rd letter, down)
Errante (1st row, 4th letter, across)
Nausea (3rd row, 5 fifth letter, across)
Explanation:
14. Dormimos 15. Estoy leyendo 16. Están trabajando 17. Estás tomando 18. verb 19. Noun 20. Cómo está usted