Give (a) thought to, birthmark, character, attribute, x, level, aim, blemish, brand, appraise, attend to, and bear in mind are all synonyms for mark. Erase and ignore are these antonyms of mark. And here are another 162 synonyms for mark.
1. blemish
2. symbol
3. sign
4. signature
5. point
6. target
7. discolour
8. name
9. assess
10. take heed of