Add s
Holiday
Dragon
Hoot
Speaker
Horse
Dwarf
Goose
Easel
Add es
Reflex
Fax
Hero
Appendix
Change f to v add es
Shelf
Loaf
Irregular
Abyss
Louse
Arch
Person
Wharf
Change y to i add es
Spy
Penny
Family
Party
Poppy
Um/Us
Bacterium
Nucleus
Fungus
Cactus
Syllabus
Curriculum
Suerte con tu tarea.
