Answer:
Down below Hope this helps
Step-by-step explanation:
1.mossed; mossing; mosses
2.Lives
3.geese
4.Memos
6.Brothers-in-law
7.series (is already plural)
8.Movies
9.Giraffes (already plural)
10.stickers
11.Baseballs
12.Taxi's
13.Armies
14.Monsters
15.Ray's
16.Focuses
17.criteria or Criterions
18.ellipses