folk
efts
Ayes, byes, cyst, eyed and gyms are four letter words. Additional four letter words include gyro, hymn, lynx, myth, type and typo.
The Phantom of the Opera -Andrew Lloyd Webber The Phantom-Baritone to High Falsetto Christine-Sophrano, First to Second range Raoul-Tenor
Rose is the most common four-letter flower. Another is iris.
pica or font
orca
Orca
Edam
gulf
Holstein
Don Giovanni is an opera buffa.
The Opera House is a type of theater, yes.