Mêmes voyelles que floculation
auguration, 
auscultation, 
commutation, 
conurbation, 
copulation, 
corrugations, 
coruscation, 
formulation, 
modulation, 
obfuscation, 
objurgation, 
obscuration, 
obturation, 
occultation, 
occupations, 
offuscation, 
osculation, 
ovulation, 
population, 
postulation, 
procuration, 
promulgation, 
sporulations.