"Edrychwch ar y sêr hyfryd."

Translation: Look at the lovely stars.

[Ree509726]

They're used synonymously, but are NOT exact symonyms. The former is dictated by aesthetics whilst the latter indicates fondness/attachment

[AlanNason]

Dach chi'n hollti blew!

[HaroldWonh]

"Beautiful" and "lovely" are exact synonyms in English.

[eAnnAe]

I agree