Nouns

(n)tolerancethe power or capacity of an organism to tolerate unfavorable environmental conditions
(n)permissiveness, tolerancea disposition to allow freedom of choice and behavior
(n)tolerancethe act of tolerating something
(n)tolerancewillingness to recognize and respect the beliefs or practices of others
(n)allowance, leeway, margin, tolerancea permissible difference; allowing some freedom to move within limits