Fearfulness is a related term of apprehension.

As nouns the difference between fearfulness and apprehension

is that fearfulness is the quality of being fearful while apprehension is apprehension.

Subsistence is a related term of forage.

As nouns the difference between subsistence and forage

is that subsistence is real being; existence while forage is fodder for animals, especially cattle and horses.

As a verb forage is

to search for and gather food for animals, particularly cattle and horses.

Impetuous is a synonym of relentless.

As adjectives the difference between impetuous and relentless

is that impetuous is making arbitrary decisions, especially in an impulsive and forceful manner while relentless is unrelenting or unyielding in severity.

Industrious is a related term of willing.

As adjectives the difference between industrious and willing

is that industrious is hard-working and persistent; worksome while willing is ready to do something that is not (can't be expected as) a matter of course.

As a noun willing is

(rare|or|obsolete) the execution of a will.

As a verb willing is

.

As verbs the difference between drive and goad

is that drive is to impel or urge onward by force; to push forward; to compel to move on while goad is to prod with a goad.

As nouns the difference between drive and goad

is that drive is (self-motivation)Self-motivation; ability coupled with ambition while goad is a long, pointed stick used to prod animals.

Travesty is a related term of pretence.

As nouns the difference between travesty and pretence

is that travesty is an absurd or grotesque misrepresentation while pretence is (label) an act of pretending or pretension; a false claim or pretext.

As a verb travesty

is to make a travesty of; to parody.

Ebullient is a related term of gay.

As an adjective ebullient

is enthusiastic; high-spirited.

As a noun gay is

nape.

As a verb gay is

to crow.

Authorised is a related term of legitimate.

As adjectives the difference between authorised and legitimate

is that authorised is while legitimate is in accordance with the law or established legal forms and requirements; lawful.

As verbs the difference between authorised and legitimate

is that authorised is (authorise) while legitimate is to make legitimate, lawful, or valid; especially, to put in the position or state of a legitimate person before the law, by legal means.

Enormous is a related term of cyclopean.

As adjectives the difference between enormous and cyclopean

is that enormous is (obsolete)  deviating from the norm; unusual, extraordinary while cyclopean is suggestive of a cyclops.

As nouns the difference between argument and appeal

is that argument is a fact or statement used to support a proposition; a reason while appeal is (a) An application for the removal of a cause or suit from an inferior to a superior judge or court for re-examination or review. (b) The mode of proceeding by which such removal is effected. (c) The right of appeal. (d) An accusation; a process which formerly might be instituted by one private person against another for some heinous crime demanding punishment for the particular injury suffered, rather than for the offense against the public. (e) An accusation of a felon at common law by one of his accomplices, which accomplice was then called an approver.

As a verb appeal is

to accuse (someone of something).