Difference between Merrily and Gayly

MERRILY vs GAYLY: ADVERB

In a cheerful or merry manner.
In a merry manner; with mirth; with gayety and laughter; jovially. See mirth, and merry.
In a joyous manner

Joyously, Joyfully, Cheerfully, Gleefully, Gay, Fortunately, Luckily, Mercifully, Gaily, With happiness, Gayly, Mirthfully, Jubilantly, Happily, Blithely

Indolently, Suavely, Saucily, Serenely, Prettily, Gaudily, Daintily, Jauntily, Gaily, With happiness, Jubilantly, Blithely, Merrily, Happily, Mirthfully

Dutifully, Blissfully, Noisily, Nonchalantly, Lazily, Contentedly, Joyously, Gay, Fortunately, Luckily, Mercifully, Gaily, Gayly, Mirthfully, Blithely

Sweetly, Languidly, Flamboyantly, Coquettishly, Regally, Indolently, Suavely, Saucily, Serenely, Gaudily, Daintily, Gaily, Blithely, Merrily, Mirthfully

Section 1 title sits merrily on the horizon.
The Princess hugged me close and laughed merrily.
Credit Acceptance, but the industry rolled merrily along.
Hot Cross Buns or Merrily We Roll Along.
And never more merrily than in these pages.
Merrily Dicks also received her Paul Harris Fellow.
The sea was calm and the sky was blue; Merrily, merrily sailed we two.
They quickly had the crowd merrily clapping in time and merrily joining in on the chorus.
Merrily, merrily shall I live now Under the blossom that hangs on the bough.
Merrily, merrily, merrily, merrily, life is but a dream!

But when I looked up wonderingly at this unusual demonstration, she only danced off gayly waving her hand at the door.
And, what was worse, he was so gayly and cynically conscious of having done me.
The story of her experiences is very gayly and very merrily set forth.
Charity, Going forth gayly in the morning to woo the world with smiles.
She had come out almost gayly, and now she was trembling.
She gayly sat down beside Alyosha on the sofa, looking at him with positive delight.
Gayly they ring, while people sing, songs of good cheer, Christmas is here.
An orchestra, riders on gayly colored bicycles led the celebrants.
Helen as the trio gayly hurried down stairs.
He mounted his horse and gayly cantered away.