Synonyms of 'feeler'

advance, antenna, approach, barb, barbel, barbule, barometer, bid, catechism, cat whisker, cross-question, demand, foretaste, hint, inquiry, interrogation, interrogative, interrogatory, invitation, issue, leader, leading, leading question, offer, offering, overture, palp, palpus, pilot balloon, presentation, probe, problem, proffer, query, question, question mark, sample, sensor, Sound, sounder, straw vote, submission, suggestion, test, tester, topic, trial balloon, vibrissa, weathercock, weather vane