mark has 56 distinct synonyms spread across 26 of its 30 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. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
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.
a number or letter indicating quality (especially of a student's performance)
“she made good marks in algebra”
a visible indication made on a surface
“some previous reader had covered the pages with dozens of marks”
the impression created by doing something unusual or extraordinary that people notice and remember
“it was in London that he made his mark”
a symbol of disgrace or infamy
“And the Lord set a mark upon Cain”
formerly the basic unit of money in Germany
Apostle and companion of Saint Peter; assumed to be the author of the second Gospel
a written or printed symbol (as for punctuation)
“his answer was just a punctuation mark”
the shortest of the four Gospels in the New Testament
something that exactly succeeds in achieving its goal
“the new advertising campaign was a bell ringer”
be a distinctive feature, attribute, or trait; sometimes in a very positive sense
“His modesty distinguishes him from his peers”
celebrate by some ceremony or observation
“The citizens mark the anniversary of the revolution with a march and a parade”
to accuse or condemn or openly or formally or brand as disgraceful
“He denounced the government action”
Synonyms, antonyms and the broader and narrower relations for mark come from Princeton University’s WordNet. Full sources and licences.