As verbs the difference between motivate and fuel

is that motivate is to provide someone with an incentive to do something; to encourage while fuel is to provide with fuel.

As a noun fuel is

substance consumed to provide energy through combustion, or through chemical or nuclear reaction.

As verbs the difference between motivate and fuelling

is that motivate is to provide someone with an incentive to do something; to encourage while fuelling is present participle of lang=en.

As a noun fuelling is

standard spelling of lang=en|from=British.

As adjectives the difference between unquenchable and insatiable

is that unquenchable is that cannot be quenched while insatiable is not satiable; incapable of being satisfied or appeased; very greedy; as, an insatiable appetite, thirst, or desire.

As an adjective lucky is

favoured by luck; fortunate; meeting with good success or good fortune said of persons.

As verbs the difference between disturbed and interrupted

is that disturbed is (disturb) while interrupted is (interrupt).

As an adjective disturbed

is showing symptoms of mental illness, severe psychosis, or neurosis.

As nouns the difference between varnish and glazing

is that varnish is a type of paint with a solvent that evaporates to leave a hard, transparent, glossy film while glazing is the part of a window or wall made of glass or another transparent material.

As verbs the difference between varnish and glazing

is that varnish is to apply varnish while glazing is present participle of lang=en.

As verbs the difference between suffered and underwent

is that suffered is past tense of suffer while underwent is simple past of undergo.

As nouns the difference between bolter and sieve

is that bolter is a person or thing that bolts, or runs suddenly while sieve is a device to separate, in a granular material, larger particles from smaller ones, or to separate solid objects from a liquid.

As a verb sieve is

to strain, sift or sort using a sieve.

As nouns the difference between narcotic and psychotropic

is that narcotic is any class of substances or drugs, that reduces pain, induces sleep and may alter mood or behaviour while psychotropic is a psychotropic drug or agent.

As adjectives the difference between narcotic and psychotropic

is that narcotic is of, or relating to narcotics while psychotropic is affecting the mind or mental processes.

As verbs the difference between chat and graph

is that chat is to be engaged in informal conversation while graph is to draw a graph.

As nouns the difference between chat and graph

is that chat is {{cx|uncountable|lang=en}} Informal conversation while graph is a diagram displaying data; in particular one showing the relationship between two or more quantities, measurements or indicative numbers that may or may not have a specific mathematical formula relating them to each other.