• rl,
• rab,
• rs,
• rt,
• vurb,
• hrb,
• ib,
• rk,
• rg,
• qb,
• ry,
• rr,
• erb,
• eb,
• rgab,
• repb,
• rp,
• irb,
• brb,
• raab

• rbi.

The adjective form of the word "rb" is "rbish". However, it is important to note that "rb" is not a standard English word, so the adjective form might not be commonly used or recognized.

The plural form of "rb" is "rbs"

The singular form of the word "rb" is "rb".