Synonyms for Suggestion:

n.

illustration, demonstration, tender, opinion, sign, advance, the color of someone's money, suspicion, approach, submission, bid, injunction, reminder, idea, evidence, mark, smoking gun, charge, presentation, proof, allusion. omen, foretaste, litmus test, tip off, plan, symptom, promise, preview, scheme, outline, signal. catharsis, defense, taste, exorcism, delusion, damage, complex, bit, defense mechanism, conditioning, fixation, fixated. overture, nomination. advice (noun)
caveat, advocacy, recommendation, warning, tip, guidance, hint, prompt, cue, monition, briefing, message, direction, clue, pointer, intelligence, encouragement, caution, news, advice, information, instruction.
advice, plan (noun)
approach, bit, scheme, bid, proffer, proposition, opinion, tender, reminder, presentation, outline, tip, idea, charge, instruction, injunction, submission, recommendation.
bewitchment (noun)
hypnotism.
course of action (noun)
scheme.
hint, implication (noun)
cue, suspicion, allusion, trace, clue.
suggestion (noun)
hint, mesmerism, prompting, proffer, trace, hypnotism, proposition.
tip-off (noun)
tip off.

Other synonyms:

bid, smoking gun, overture. illustration, nomination, advance, taste, evidence. approach, sign, demonstration. submission, proof. mark. prompt
reminder.
reference
allusion.
Other relevant words:
charge, idea, mark, trace, presentation, hypnotism, proposition, mesmerism, proof, foretaste, signal, submission, opinion, prompting, symptom, evidence, reminder, overture, illustration, approach, advance, demonstration, smoking gun, allusion, outline, scheme, bit, plan, advice, bid, nomination, taste, proffer, tender, injunction, suspicion, sign.

Usage examples for suggestion

  1. She had a suggestion to make to Ruth. – The Rebel of the School by Mrs. L. T. Meade
  2. " I declare, Dora," he said, " that is a good practical suggestion – The Girl at Cobhurst by Frank Richard Stockton
  3. Our Aunt Esta was perfectly delighted with the suggestion – Fairy Prince and Other Stories by Eleanor Hallowell Abbott