Usually from Latin.

Asia

freesia

Friesian

fusion

lesion

Persia

version

vision

abrasion

adhesion

allusion

amnesia

artesian

aversion

cohesion

collision

collusion

conclusion

confusion

corrosion

conversion

decision

delusion

derision

diffusion

dispersion

diversion

division

effusion

erosion

evasion

excision

exclusion

excursion

explosion

fantasia

illusion

immersion

incision

inclusion

incursion

infusion

intrusion

invasion

inversion

magnesia

Malaysia

occasion

occlusion

perfusion

persuasion

perversion

precision

profusion

provision

reversion

revision

seclusion

subdivision

subversion

transfusion

disillusion

indecision

Indonesia

Melanesia

Micronesia

Polynesia

supervision

television