What is after a heptalogy?
This is an excellent question. The terms are as follows: Set of
2 - Duology, 3 - Trilogy, 4 - Tetralogy, 5 - Pentalogy, 6 -
Hexology, 7 - Heptalogy, 8 - Octology, 9 - Ennealogy, 10 -
Decology. After the 10 mark there is a slight change... 11 -
Undecology, 12 - Dodecology... from 13 to 18 the same greek
prefixes are used before the word part "decology" ~
tri,tetra,penta,hexa,hepta and octodecology... on to 20 it is
Nonodecology and Icosology. Hope this helps and answers your
question.