Sinonim trial balloon

English Thesaurus

1. a balloon sent up to test air currents (noun.artifact)

hypernym	:	balloon,
definition	:	large tough nonrigid bag filled with gas or heated air (noun.artifact)

2. a test of public opinion (noun.cognition)

hypernym	:	test, trial, trial run, tryout,
definition	:	trying something to find out about it (noun.cognition)