I. noun
1.
Synonyms: track 1, tread
Related Word: evidence, proof
2.
Synonyms: vestige 1, memento, relic, shadow
Related Word: mark, token
3.
Synonyms: hint 2, intimation, shade, smell, soupçon, strain, streak, suspicion, tinge, whiff
II. verb
Synonyms: track 1, trail