As a proper noun fish

is .

As a noun mosquitofish is

any of several small fish that feed on mosquitoes, but especially those of the genus.

As a noun nanomechanism

is any nanoscale mechanism.

As an adjective nanomechanical is

of or pertaining to nanomechanisms.

As nouns the difference between nanoscale and nanomechanism

is that nanoscale is a measuring tool with gradations in nanometers while nanomechanism is any nanoscale mechanism.

As an adjective nanoscale

is on a scale measured in nanometers.

As nouns the difference between mechanism and nanomechanism

is that mechanism is within a machine or machinery; any mechanical means for the conversion or control of motion, or the transmission or control of power while nanomechanism is any nanoscale mechanism.

As an adjective anticipatory

is characterized by anticipation.

As a noun feedforward is

an anticipatory response to expected changes in the environment of a system.

As a verb feedforward is

to respond in advance.

Anticipate is a synonym of feedforward.

As verbs the difference between anticipate and feedforward

is that anticipate is to act before (someone), especially to prevent an action while feedforward is (nonstandard) to respond in advance.

As a noun feedforward is

(sometimes countable) an anticipatory response to expected changes in the environment of a system.

Feedforward is a synonym of proact.

As verbs the difference between proact and feedforward

is that proact is to take action in advance of an expected event while feedforward is to respond in advance.

As a noun feedforward is

an anticipatory response to expected changes in the environment of a system.

In physics terms the difference between viscous and viscoelasticity

is that viscous is of or pertaining to viscosity while viscoelasticity is the branch of rheology that studies such materials.

As an adjective viscous

is having a thick, sticky consistency between solid and liquid.

As a noun viscoelasticity is

the property of a material that is both viscous and elastic.

As nouns the difference between elastic and viscoelasticity

is that elastic is an elastic material used in clothing, particularly in waistbands and cuffs while viscoelasticity is the property of a material that is both viscous and elastic.

As an adjective elastic

is capable of stretching; particularly, capable of stretching so as to return to an original shape or size when force is released.

In physics|lang=en terms the difference between rheology and viscoelasticity

is that rheology is (physics) the branch of physics that studies the deformation and flow of matter while viscoelasticity is (physics) the branch of rheology that studies such materials.

As nouns the difference between rheology and viscoelasticity

is that rheology is (physics) the branch of physics that studies the deformation and flow of matter while viscoelasticity is (physics) the property of a material that is both viscous and elastic.