variating

As a noun terms

is .

As a verb variating is

.

As verbs the difference between vary and variating

is that vary is to change with time or a similar parameter while variating is .

As a noun vary

is (obsolete) alteration; change.

As verbs the difference between varying and variating

is that varying is while variating is .

As a noun varying

is a kind of variable, used by a fragment shader, that interpolates values across a primitive, so as to produce gradient effects etc.