Difference between Sincere and Dear

SINCERE vs DEAR: NOUN

A sweet innocent mild-mannered person (especially a child)
A beloved person; used as terms of endearment
A darling: a word denoting tender affection or endearment, most commonly used in direct address: as, my dear.
An obsolete spelling of deer.
A dear one; lover; sweetheart.
An endearing, lovable, or kind person.
A person who is greatly loved. Often used as a form of address.
A very kind, loving person.
A beloved person

Meant truly or earnestly.
Earnest; meaning what one says or does; truthful.
Honest; free from hypocrisy or dissimulation.
Being in reality what it appears to be; having a character which corresponds with the appearance; not falsely assumed; genuine; true; real.
Whole; perfect; unhurt; uninjured.
Pure; unmixed; unadulterated.
Pure; unadulterated.
Being without hypocrisy or pretense; true.
Not feigned or affected; genuine.
Open and genuine; not deceitful
Characterized by a firm and humorless belief in the validity of your opinions

Highly esteemed or regarded. Used in direct address, especially in salutations.
High-priced; expensive.
Charging high prices.
Noble; worthy.
Dearly loved
Loved and cherished.
Greatly valued; precious.
With or in a close or intimate relationship
Earnest
Earnest; ardent.
Noble
An ironic way to start (often after my) addressing an inferior.
A formal way to start (often after my) addressing somebody one likes or regards kindly.
A formal way to start (possibly after my) addressing somebody at the beginning of a letter, memo etc.
High in price; expensive.
Precious to or greatly valued by someone.
Loving, affectionate, heartfelt
Loved; lovable.
Of disagreeable things and antipathies.
Of agreeable things and interests.
Hence, close to the heart; heartfelt; present in mind; engaging the attention.
Highly valued; greatly beloved; cherished; precious.
Marked by scarcity or dearth, and exorbitance of price.
Bearing a high price; high-priced; costly; expensive.
Heartfelt.
Severe; grievous; sore.

Not deceitful
Open and genuine
Sound; whole; unbroken; without error, defect, or injury.
Having no admixture; free; clear: followed by of.
Unalloyed or unadulterated by deceit or unfriendliness; free from pretense or falsehood; honestly felt, meant, or intended: as, a sincere wish; a sincere effort.
Free from duplicity or dissimulation; honest in speech or intention; guileless; truthful; frank.
Morally pure; undepraved; upright; virtuous; blameless.
Synonyms and Fair, Open, etc. (see candid); Cordial, Sincere, etc. (see hearty), unfeigned, undissembling, artless, heartfelt.
Pure; unmixed; unadulterated; free from imitation; good throughout: as, sincere work.

Coming from the heart; heartfelt; earnest; passionate.
Dangerous; deadly.
[Obsolete or archaic in senses , and 8.]
Held in tender affection or esteem; loved; beloved: as, a dear child; a dear friend
Dearly; very tenderly.
At a dear rate; at a high price.
An exclamation indicating surprise, pity, or other emotion: used absolutely or in connection with oh or me: as, oh dear ! I am so tired; dear me ! where have you been?
To make dear; endear.
Charging high prices: as, a dear tailor.
Characterized by high prices in consequence of scarcity or dearth: as, a dear season.
Costly; high in price; expensive, either absolutely, or as compared with the cost of other similar things, or of the same thing at other times or places: opposed to cheap.
Precious; of great value; highly esteemed or valued.
Intense; deep; keen; being of a high degree.
Having a high price
Sincerely earnest
Used as terms of endearment

Heart whole, Bona fide, Dear, Serious, Solemn, Devout, True, Unfeigned, Earnest, Fervent, Wholehearted, Cordial, Honest, Genuine, Heartfelt

Earnest, Lamb, Pricy, Costly, Near, Close, Darling, Good, Devout, Heartfelt, Affectionately, Sincere, Loved, Love, Beloved

Heart whole, Bona fide, Dear, Serious, Solemn, Devout, True, Unfeigned, Earnest, Fervent, Wholehearted, Cordial, Honest, Genuine, Heartfelt

Honey, Earnest, Lamb, Pricy, Costly, Near, Close, Darling, Good, Devout, Heartfelt, Sincere, Loved, Love, Beloved

Sincere wishes on your anniversary, Mom and Dad!
One integral and sincere confession within nine days.
Please believe in my feelings of sincere friendship.
Please be reflective and sincere in your discussion.
Crown patrons has often been read as sincere.
Finallymy most sincere thanks to my wife Lauren.
He is childlike, simple, humble, sincere, and forgiving.
Heather Price is sincere, laid back and professional.
Those sincere men who told them so believed it because an earlier generation of sincere men had told them the very same thing.
Her narratives combine sincere anxiety and sincere compassion.

Dear Family, I am so sorry to hear of the loss of your dear Paul and send you my sincere condolences.
Dear Nancy, John and family, I was so very sorry to hear that your lost your dear, sweet mother.
Dear Past Dear Past been through so much I thought it would never last.
Dear Joanne, Janice and family, I was so sorry to hear about the loss of your dear mother, Joan.
Dear Jean and family, I was so sorry to hear about the loss of your dear husband Glen.
But my dear, dear Damper; did she speak much sally granted: at least, nobody said the contrary.
Dear Joyce and Harry, Please accept our sincerest sympathy on the loss of your dear sister Joanne.
Dear Wayne, Please accept my condolence over the loss of your dear Maryrose.
Dear readers: Writing this post is very dear to me.
Smith; Dear Doctor Ernst; Dear Sir or Madam.