suggestion in WordNet English dictionary

1. a just detectable amount
   "he speaks French with a trace of an accent"
   trace  hint  suggestion 
   
2. the act of inducing hypnosis
   hypnotism  mesmerism  suggestion 
   
3. a proposal offered for acceptance or rejection
   "it was a suggestion we couldn't refuse"
   suggestion  proposition  proffer 
   
4. persuasion formulated as a suggestion
   suggestion  prompting 
   
5. an idea that is suggested
   "the picnic was her suggestion"
   suggestion 
   
6. the sequential mental process in which one thought leads to another by association
   suggestion