Unusually is a related term of mainly.

As adverbs the difference between unusually and mainly

is that unusually is in an unusual manner while mainly is (label) forcefully, vigorously.

Aching is a related term of discomfort.

As verbs the difference between aching and discomfort

is that aching is while discomfort is to cause annoyance or distress to.

As nouns the difference between aching and discomfort

is that aching is the feeling of an ache; a dull pain while discomfort is mental or bodily distress.

As an adjective aching

is that aches; continuously painful.

Swift is a related term of effective.

As an initialism swift

is society for worldwide interbank financial telecommunication.

As an adjective effective is

having the power to produce a required effect or effects.

As a noun effective is

(military) a soldier fit for duty.

Sublimity is a related term of excellence.

As a noun sublimity

is (uncountable) the state of being sublime.

As a proper noun excellence is

a title of honor or respect; more common in the form excellency.

Impeccable is a related term of stainless.

As adjectives the difference between impeccable and stainless

is that impeccable is perfect, without faults, flaws or errors while stainless is describing an alloy that is resistant to corrosion and discoloration.

As a noun stainless is

short for stainless steel.

Sensational is a related term of rave.

As an adjective sensational

is of or pertaining to sensation.

As a noun rave is

an enthusiastic review (such as of a play) or rave can be one of the upper side pieces of the frame of a wagon body or a sleigh.

As a verb rave is

to wander in mind or intellect; to be delirious; to talk or act irrationally; to be wild, furious, or raging.

Wingding is a related term of hallowing.

As nouns the difference between wingding and hallowing

is that wingding is a fit or spasm while hallowing is the act by which something is hallowed.

As a verb hallowing is

.

Licentious is a synonym of excessive.

As adjectives the difference between licentious and excessive

is that licentious is lacking restraint, or ignoring societal standards, particularly in sexual conduct while excessive is exceeding the usual bounds of something; extravagant; immoderate.

Unfitness is a related term of weakness.

As nouns the difference between unfitness and weakness

is that unfitness is the characteristic of being unfit while weakness is (uncountable) the condition of being weak.

Thought is a related term of fastidiousness.

As nouns the difference between thought and fastidiousness

is that thought is form created in the mind, rather than the forms perceived through the five senses; an instance of thinking while fastidiousness is the quality of being fastidious.

As a verb thought

is (think).