Difference between Laments and Regret

LAMENTS vs REGRET: NOUN

A feeling of sorrow, disappointment, distress, or remorse about something that one wishes could be different.
A sense of loss and longing for someone or something gone or passed out of existence.
A courteous expression of regret, especially at having to decline an invitation.
Grief or trouble caused by the want or loss of something formerly possessed; a painful sense of loss; desire for what is gone; sorrowful longing.
Pain or distress of mind, as at something done or left undone; the earnest wish that something had not been done or did not exist; bitterness of reflection.
Dislike; aversion.
An expression of regret: commonly in the plural.
A written communication expressing sorrow for inability to accept an invitation.
Synonyms Concern, Sorrow, lamentation.
Penitence, Compunction, etc. See repentance.
Pain of mind on account of something done or experienced in the past, with a wish that it had been different; a looking back with dissatisfaction or with longing; grief; sorrow; especially, a mourning on account of the loss of some joy, advantage, or satisfaction.
The instance of such an emotion.
Sadness associated with some wrong done or some disappointment

Be sorry
Decline formally or politely
Feel sad about the loss or absence of
Feel remorse for; feel sorry for; be contrite about
To feel sorry about (a thing that has happened), afterthink: to wish that a thing had not happened, that something else had happened instead.
To feel sorry about (any thing).
Express with regret

To experience regret on account of; to lose or miss with a sense of regret; to feel sorrow or dissatisfaction on account of (the happening or the loss of something)

To look back at with sorrow; feel grief or sorrowful longing for on looking back.
To grieve at; be mentally distressed on account of: as, to regret one's rashness; to regret a choice made.
Synonyms To rue, lament. See repentance.
Be contrite about
Feel sorry for
Feel remorse for

Complains, Bemoans, Coronach, Keen, Plaint, Requiem, Regret, Threnody, Deplore, Elegy, Dirge, Wail, Bewail, Lamentation, Bemoan

Regrettable, Apologies, Apologize, Remorse, Sorry, Disappointment, Sadness, Ruefulness, Bemoan, Rue, Bewail, Repent, Lament, Deplore, Sorrow

Mourning, Mourn, Moans, Mourns, Keen, Plaint, Requiem, Regret, Threnody, Deplore, Elegy, Dirge, Wail, Bewail, Lamentation

Sympathy, Contrition, Frustration, Unhappiness, Shame, Regrettable, Sorry, Sadness, Ruefulness, Rue, Bewail, Repent, Lament, Deplore, Sorrow

Their pitiful laments could be heard throughout the ward.
Individual Laments, songs of supplication, complaint, grief, or sorrow.
Ozzy, mixing ruthless rage with sorrowful laments towards heaven.
Hollywood, or laments the gentrification of black neighbourhoods.
Larry laments that Delta has a terrible reputation.
Yap laments: Local guidelines not against national prot.
My hart laments the errors of mine eie.
Julie laments, is a huge problem as well.
Bill Gates laments White House meddling with FDA.
Getty, Jack laments his cobbler addiction, Marshall laments another setback in quest for improved fitness and Joe.

Regret following transition is not an infrequent phenomenon.
Written to express regret for making a late payment is written to express regret for making late!
American territory or an American ally, he will truly regret it, and he will regret it fast.
True remorse is never just a regret over consequence; it is a regret over motive.
Sometimes the accuser will later regret a consensual sexual encounter and may accuse the other out of regret or embarrassment.
If men do regret leaving, why do they regret it?
And thats what i regret the most, really really regret.
Yes, you will always live with this regret, but regret is a consequence of sin.
Decision Regret following Treatment for Localized Breast Cancer: Is Regret Stable Over Time?
Surely you shall regret this, and regret it bitterly.