Names of polygons with 11 sided to 20 sides?

11 Undecagon, Hendecagon

12 Dodecagon

13 Tridecagon, Triskaidecagon

14 Tetradecagon, Tetrakaidecagon

15 Pentadecagon, Pentakaidecagon

16 Hexadecagon, Hexakaidecagon

17 Heptadecagon, Heptakaidecagon

18 Octadecagon, Octakaidecagon

19 Enneadecagon, Enneakaidecagon

20 Icosagon