Difference between Ugly Duckling and Exolete

UGLY DUCKLING vs EXOLETE: NOUN

A young person who is ugly, but who is expected to become beautiful as they mature.
One that is considered ugly or unpromising at first but has the potential to become beautiful or admirable in maturity.
An ugly or unpromising child who grows into a beautiful or worthy person

Mangy, Sickly, Decrepit, Homely, Gamine, Eyesore, Unlovable, Ingenue, Gawky, Unlovely, Frumpy, Unloved, Frump, Ugly, Unattractive

Uninterestingness, Uninteresting, Obsolete, Vapid, Gustless, Hebete, Wersh, Insipient, Outdated, Parachronistic, Ingustable, Insipid, Wearish, Insulse, Stale

Mangy, Sickly, Decrepit, Homely, Gamine, Eyesore, Unlovable, Ingenue, Gawky, Unlovely, Frumpy, Unloved, Frump, Ugly, Unattractive

Uninterestingness, Uninteresting, Obsolete, Vapid, Gustless, Hebete, Wersh, Insipient, Outdated, Parachronistic, Ingustable, Insipid, Wearish, Insulse, Stale

As Pegram puts it, "the ugly duckling grew into a beautiful swan," and gave Pegram his moon walk.
We took our really ugly duckling and transformed it into a home style that we invisioned.
Perhaps the best known story about a swan is " The Ugly Duckling " fable.
Essentially, this book is the ugly duckling book about a horse.
The rain was still pouring down, an ugly duckling that never made it to swan.
The Bissell Steam Shot Deluxe is an ugly duckling that packs a punch.
Once again, I will be the big, fat, ugly duckling of my family.
Well, as it turned out, he was just a really ugly duckling.
Matt turned my Ugly Duckling Appartment into a beautiful Swan!
Participants: Luis Felipe Fabre and Ugly Duckling Presse Committee.