Addition is a synonym of appending.

As a noun addition

is addition.

As a verb appending is

.

Vehement is a related term of spirited.

As adjectives the difference between vehement and spirited

is that vehement is vehement while spirited is lively, vigorous, animated or courageous.

As a verb spirited is

(spirit).

Right is a related term of excuse.

As verbs the difference between right and excuse

is that right is to correct while excuse is .

As an adjective right

is (archaic) straight, not bent.

As an adverb right

is on the right side or right can be exactly, precisely.

As an interjection right

is yes, that is correct; i agree.

As a noun right

is that which complies with justice, law or reason.

Rile is a related term of chafe.

As verbs the difference between rile and chafe

is that rile is to make angry while chafe is .

Lessen is a related term of pacify.

In lang=en terms the difference between lessen and pacify

is that lessen is to become less while pacify is to appease (someone).

As verbs the difference between lessen and pacify

is that lessen is to make less; to diminish; to reduce while pacify is to bring peace to (a place or situation), by ending war, fighting, violence, anger or agitation.

Hullabaloo is a related term of caterwauling.

As nouns the difference between hullabaloo and caterwauling

is that hullabaloo is an uproar or fuss while caterwauling is a sound that caterwauls.

As a verb caterwauling is

.

Admission is a synonym of declaration.

As nouns the difference between admission and declaration

is that admission is the act or practice of admitting while declaration is declaration (written or oral indication of a fact, opinion, or belief).

As adjectives the difference between colourless and ashy

is that colourless is having little or no colour while ashy is having the color of ashes.

As nouns the difference between oversupply and saturation

is that oversupply is an excessive supply while saturation is the act of saturating or the process of being saturated.

As a verb oversupply

is to supply more than is needed.

Nub is a related term of prominence.

As nouns the difference between nub and prominence

is that nub is newbie, amateur while prominence is the state of being prominent: widely known or eminent.