For a regular amount of money given to someone:
* Stipend: This implies a regular, often fixed, payment for services or expenses.
* Pocket money: This is a common synonym for allowance, specifically for children.
* Grant: This implies a sum of money given for a specific purpose.
* Stipulation: This implies a set amount of money, often written into a contract.
For a permitted amount of something:
* Quota: This refers to a specific quantity that is allowed.
* Limit: This implies a maximum amount that is permitted.
* Tolerance: This refers to the degree to which something is permitted to vary.
* Leeway: This implies a degree of freedom or flexibility in what is allowed.
For a deduction from something:
* Deduction: This refers to an amount that is subtracted.
* Discount: This implies a reduction in price.
* Abatement: This implies a reduction in an amount of money due.
For a small amount of something:
* Modicum: This implies a small but significant amount.
* Drizzle: This implies a small amount of liquid.
* Sliver: This implies a small, thin piece of something.
To choose the most appropriate synonym, consider the specific context in which "allowance" is being used.