Difference between Inconstancy and Faithlessness

INCONSTANCY vs FAITHLESSNESS: NOUN

Lack of constancy; lack of consistency in thought, emotion or action.
The quality or state of being inconstant; lack of constancy; mutability; fickleness; variableness.
Synonyms Changeableness, vacillation, wavering.
Lack of sameness or uniformity; dissimilitude.
Lack of constancy in action, feeling, etc.; mutability or instability; unsteadiness; fickleness: as, the inconstancy of a flame, or of one's temper.
The state or quality of being eccentrically variable or fickle.
Unfaithfulness by virtue of being unreliable or treacherous
The quality of being changeable and variable

Stubbornness, Indecisiveness, Obstinacy, Doubleness, Inconsistency, Timidity, Duplicity, Wilfulness, Vacillation, Contrariness, Capriciousness, Changefulness, Falseness, Fickleness, Faithlessness

Lust, Ungratefulness, Covetousness, Immorality, Selfishness, Sinfulness, Unworthiness, Faithfulness, Unbelief, Betrayal, Wickedness, Unfaithfulness, Fickleness, Falseness, Inconstancy

Ineffectuality, Indirectness, Ambiguousness, Stubbornness, Indecisiveness, Obstinacy, Doubleness, Inconsistency, Duplicity, Wilfulness, Vacillation, Contrariness, Capriciousness, Changefulness, Falseness

Deracination, Abjection, Despair, Impiety, Lust, Ungratefulness, Covetousness, Immorality, Sinfulness, Faithfulness, Unbelief, Betrayal, Wickedness, Falseness, Inconstancy

No. Madam Speaker, the Government has to be consistent with what it says because inconstancy is against the morals that they are talking about.
God, such as dependence on prior things, and permissive power, error of mind and inconstancy of will.
To remove any possibility of doubts, he canonized those scriptures in which he is rebuked for his inconstancy and weakness.
Those who make vows should be on their guard, however, against frequent and needless changes, since inconstancy is harmful spiritually.
There is a resolution inconstancy for the DJ bundle for Jager, Blitz, Bandit, and IQ.
The moon is usually neither malevolent nor benevolent, though strongly influential upon lovers and noted for her inconstancy.
But inconstancy like any other temporary dereliction, would not be found incompatible with a character of uncommon excellence.
He had impressive strengths but also formidable weaknesses, amongst them inconstancy, financial irresponsibility, and a capacity for brutality.
There is nothing in this world constant but inconstancy.
Shakespeare is innocent of the inconstancy he condemns.

God hates the treachery or faithlessness of breaking the marriage covenant.
Or do ye think that what the Scripture says about faithlessness to God is idly spoken?
The broken trust, faithlessness, ruined that relationship just as it does in our human relationships.
Can you imagine that their faithlessness could disturb the faithfulness of God?
Their faithlessness leads to the eventual destruction of both Israel and Judah.
The result of faithlessness will be to remain in perpetual darkness.
He addresses their faithlessness towards the covenant of marriage itself.
Even our faithlessness cannot prevent God from being faithful.
Weeds of insecurity, faithlessness, and despair will surely die.
Everyone else is left to die in faithlessness.