RSA

1. Republic of South Africa
2. Returned Services Association (NZ)
3. Royal Scottish Academy or Academician
4. Royal Society of Arts (officially the Royal Society for encouragment of Arts, Manufactures and Commerce)

• sing another song
• sing another tune
• Singaporean
• Singapore Sling
• singe
• singed
• singed cat
• singed cats
• singeing
• singer
• singers
• singer-songwriter
• singer-songwriters
• singes
• Singhalese
• singing
• singing-bird
• singing-birds
• singing flame
• singing flames
• singing-galleries
• singing-gallery
• singing hinnies
• singing hinny
• singingly