sincerely

genuinely

In a real manner

• truthfullyWithout deception or lies
• honestlyIn a truthful manner
• earnestlyWith deep sincerity

wholeheartedly · candidly · frankly · unreservedly · unaffectedly · unpretentiously · transparently · forthrightly · openheartedly · straightforwardly

yours truly

Humble self-reference

• regardsGood wishes sent
• best regardsCourteous correspondence closing
• warm regardsAffectionate epistolary farewell

kind regards · respectfully · cordially · faithfully · yours faithfully · affectionately · warmly · fondly · with gratitude · best wishes

deeply

To a profound extent

• profoundlyTo an extreme degree
• ferventlyWith intense passionate feeling
• passionatelyWith intense emotion

ardently · intensely · devoutly · zealously · wholeheartedly · earnestly · heartfelt · with all my heart · completely · utterly

respectfully

In a deferential way

• deferentiallyWith respectful yielding
• humblyWithout pride or arrogance
• graciouslyWith elegant kindness

reverently · appreciatively · gratefully · admiringly · courteously · politely · formally · honorably

• greeting card contenthappy birthday, get well soon, congratulations, thank you, sympathy
• sign-offsgoodbye, farewell, bye, see you later, best wishes
• Candor Phrasesto be honest, truth be told, honestly, frankly, to tell the truth
• formalitydecorum, etiquette, propriety, politeness, respectfully
• letter elementsdear sir, yours truly, to whom it may concern, warm regards, best wishes
• pledgesvow, promise, I promise, wedding vows, I vow