tolerant has 6 distinct synonyms spread across 4 of its 5 senses. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. Its one recorded opposite is intolerant.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
showing respect for the rights or opinions or practices of others
tolerant and forgiving under provocation
“our neighbor was very kind about the window our son broke”
showing or characterized by broad-mindedness
“a broad political stance”
able to tolerate environmental conditions or physiological stress
“the plant is tolerant of saltwater”
Synonyms, antonyms and the broader and narrower relations for tolerant come from Princeton University’s WordNet. Full sources and licences.