As adjectives the difference between bad and bitter

is that bad is not good; unfavorable; negative while bitter is having an acrid taste (usually from a basic substance).

As nouns the difference between bad and bitter

is that bad is error, mistake while bitter is a liquid or powder, made from bitter herbs, used in mixed drinks or as a tonic.

As verbs the difference between bad and bitter

is that bad is form of Alternative past tense|bid|lang=en. See {{l/en|bade|bade}} while bitter is to make bitter.

As an adverb bad

is badly.

Fast is a synonym of soundly.

As a verb fast

is .

As an adverb soundly is

in a thorough manner; in manner free of defect or deficiency.

Unmerciful is a related term of unsparing.

As adjectives the difference between unmerciful and unsparing

is that unmerciful is not showing mercy while unsparing is without sparing.

As nouns the difference between intent and substance

is that intent is a purpose; something that is intended while substance is physical matter; material.

As an adjective intent

is firmly fixed or concentrated on something.

Grievous is a synonym of distressing.

As adjectives the difference between grievous and distressing

is that grievous is causing grief, pain or sorrow while distressing is causing distress; upsetting.

As a verb distressing is

.

Existence is a synonym of materialisation.

As nouns the difference between existence and materialisation

is that existence is the state of being, existing, or occurring; beinghood while materialisation is materialization.

Secure is a related term of vigilant.

As adjectives the difference between secure and vigilant

is that secure is free from attack or danger; protected while vigilant is watchful, especially for danger or disorder; alert; wary.

As a verb secure

is to make safe; to relieve from apprehensions of, or exposure to, danger; to guard; to protect.

Lone is a related term of forgotten.

As a proper noun lone

is .

As an adjective forgotten is

of which knowledge has been lost; which is no longer remembered.

As a verb forgotten is

.

As a noun forgotten is

a person or thing that has been forgotten.

Sacrosanct is a related term of revered.

As adjectives the difference between sacrosanct and revered

is that sacrosanct is beyond alteration, criticism, or interference, especially due to religious sanction; inviolable while revered is respected or given reverence.

As a verb revered is

(revere).

Skilled is a related term of quick.

As adjectives the difference between skilled and quick

is that skilled is having or showing skill; skilful while quick is moving with speed, rapidity or swiftness, or capable of doing so; rapid; fast.

As verbs the difference between skilled and quick

is that skilled is (skill) while quick is to amalgamate surfaces prior to gilding or silvering by dipping them into a solution of mercury in nitric acid.

As an adverb quick is

(colloquial) with speed, quickly.

As a noun quick is

raw or sensitive flesh, especially that underneath finger and toe nails.