chiefly
91caesium — chiefly British variant of cesium …
92calliper — chiefly British variant of caliper …
93candour — chiefly British variant of candor …
94centre — chiefly British variant of center …
95cheque — chiefly British variant of check I 7 …
96chequer — chiefly British variant of checker …
97chimaeric — chiefly British variant of chimeric …
98chimaerism — chiefly British variant of chimerism …
99civilisation — chiefly British variant of civilization …
100civilise — chiefly British variant of civilize …