Non-analytic smooth function – Mathematical functions which are smooth but not analytic

Singularity (mathematics) – Point where a function, a curve or another mathematical object does not behave regularly

Sinuosity – Ratio of arc length and straight-line distance between two points on a wave-like function

Smooth number (number theory)

image smoothness

define smoothness

wikipedia smoothness

weblio smoothness

kotobank smoothness

jisho smoothness