As nouns the difference between chino and twill
is that
chino is a coarse cotton fabric commonly used to make trousers and uniforms while
twill is a pattern, characterised by diagonal ridges, created by the regular interlacing of threads of the warp and weft during weaving.
As a verb twill is
to weave (cloth, etc.) so as to produce the appearance of diagonal lines or ribs on the surface.