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)

• sharpie
• sharpies
• sharping
• sharpings
• sharpish
• sharp-looking
• sharply
• sharpness
• sharpnesses
• sharp-nosed
• sharp-pointed
• sharp practice
• sharp practices
• sharps
• sharp-set
• sharp-shod
• sharpshooter
• sharpshooters
• sharpshooting
• sharpshootings
• sharp-sighted
• sharp's the word
• sharp stick
• sharp-tailed grouse
• sharp-tongued