• trazosin,
• rerazosin,
• ferazosin,
• gerazosin,
• yerazosin,
• 6erazosin,
• 5erazosin,
• twrazosin,
• tsrazosin,
• tdrazosin,
• trrazosin,
• t4razosin,
• teraxosin,
• terazoson,
• terrazosin,
• tarazosin,
• terazosyn,
• terrosin,
• Terasozin,
• Terazison

• teargas,
• Terrazas.

The plural form of the word "terazosin" remains the same.

The singular form of the word "terazosin" is "terazosin". The word itself is a singular noun, and it does not change in form when referring to a single item or unit.