As an adjective unappealing

is not appealing.

As an adverb unappetizingly is

in an unappetizing or unappealing manner.

Appetizingly is an antonym of unappetizingly.

As adverbs the difference between appetizingly and unappetizingly

is that appetizingly is in an appetizing manner while unappetizingly is in an unappetizing or unappealing manner.

As a noun tendency

is a likelihood of behaving in a particular way or going in a particular direction; a tending toward.

As an adjective vindicative is

having a tendency to vindicate.

Vindicative is a derived term of vindicate.

As a verb vindicate

is to clear from an accusation, suspicion or criticism.

As an adjective vindicative is

having a tendency to vindicate.

As adjectives the difference between vengeful and vindicative

is that vengeful is vindictive or wanting vengeance while vindicative is having a tendency to vindicate.

Vindicative is a derived term of vindicativeness.

As a noun vindicativeness

is the quality of being vindicative.

As an adjective vindicative is

having a tendency to vindicate.

As nouns the difference between quality and vindicativeness

is that quality is level of excellence while vindicativeness is the quality of being vindicative.

As an adjective quality

is being of good worth, well made, fit for purpose.

As adjectives the difference between appropriate and unbefitting

is that appropriate is (obsolete) set apart for a particular use or person; reserved while unbefitting is not befitting; not appropriate to.

As a verb appropriate

is (archaic) to make suitable; to suit.

As nouns the difference between obscurity and bumwhush

is that obscurity is (label) darkness; the absence of light while bumwhush is obscurity, ruin, annihilation.

As nouns the difference between ruin and bumwhush

is that ruin is while bumwhush is obscurity, ruin, annihilation.