As nouns the difference between variability and flexible

is that variability is the state or characteristic of being variable while flexible is something that is flexible.

As an adjective flexible is

capable of being flexed or bent without breaking; able to be turned, bowed, or twisted, without breaking; pliable; not stiff or brittle.

As a noun journal is

.

As nouns the difference between predict and predictions

is that predict is (obsolete) a prediction while predictions is .

As a verb predict

is to make a prediction: to forecast, foretell, or estimate a future event on the basis of knowledge and reasoning; to prophesy a future event on the basis of mystical knowledge or power.

As nouns the difference between disturb and disturbances

is that disturb is (obsolete) disturbance while disturbances is .

As a verb disturb

is to confuse a quiet, constant state or a calm, continuous flow, in particular: thoughts, actions or liquids.

As nouns the difference between multiplication and array

is that multiplication is (uncountable|mathematics) the process of computing the sum of a number with itself a specified number of times, or any other analogous binary operation that combines other mathematical objects