Mêmes consonnes que isrs
aciération,
assertion,
assurance,
c.r.s.,
cerce,
cerceau,
cerceaux,
ceriséen,
circé,
circée,
cirrhus,
cirrus,
cirse,
crs,
cyrus,
cération,
cérès,
incération,
insertion,
sarasson,
sarisse,
saros,
sce,
serration,
sioracois,
sirius,
sorcier,
source,
sourcer,
sourcier,
sourcil,
sourciller,
sourcilleux,
sourcé,
souriceau,
souriceaux,
souricier,
sous-races,
surhausser,
sursaut,
sursauts,
sursis,
sérancer,
sériation.