Category:Morphology
Feature:Inflectional Synthesis of the Verb WALS
Name:12-13 categories per word
Languages (28):
Conlangs (26):
Qþyn|gài
Old Adpihi
Songulda
Velyan
Feayran 
Due to recent changes in grammar, Feayran verbs now synthesize more than 12 categories.
Solaric
Dacayan
Kangir
Redspeech
Mithara
K'u1k'uts'
Alley's Language
Proto-Angelic
Adinjo
Lanbuvia
Minhast
Spraka
Siaswo
Testonian
Salga
Settamu
Ancient Draconian
At'ik
Jongré
Ithkuil III
New Ithkuil

Natlangs (2):
Koasati
Wichita