tolerance vs allowance

tolerance and allowance both are nouns.

Word	Noun	Adjective	Verb	Adverb
tolerance	Yes	No	No	No
allowance	Yes	No	Yes	No

As nouns, allowance is a hypernym of tolerance; that is, allowance is a word with a broader meaning than tolerance:

As nouns, tolerance and allowance are synonyms defined as:

tolerance and allowance: a permissible difference; allowing some freedom to move within limits

Other synonyms of tolerance include leeway, margin.

tolerance (noun)	allowance (noun)
the act of tolerating something	the act of allowing
a permissible difference; allowing some freedom to move within limits	a permissible difference; allowing some freedom to move within limits
the power or capacity of an organism to tolerate unfavorable environmental conditions	an amount allowed or granted (as during a given period)
a disposition to allow freedom of choice and behavior	an amount added or deducted on the basis of qualifying circumstances
willingness to recognize and respect the beliefs or practices of others	a sum granted as reimbursement for expenses
	a reserve fund created by a charge against profits in order to provide for changes in the value of a company's assets

tolerance (verb)	allowance (verb)
	put on a fixed allowance, as of food