Pilot balloons
Trial balloons and pilot balloons are semantically related. In some cases you can replace phrase "Trial balloons" with "Pilot balloons", this phrases are similar.
Trial balloons
Pilot balloons and trial balloons are semantically related. You can use "Pilot balloons" instead a noun phrase "Trial balloons".
Mutual synonyms
Cite this Source
Trial balloons and Pilot balloons. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/pilot_balloons/trial_balloons
Pilot balloons & Trial balloons. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/pilot_balloons/trial_balloons>.
Trial balloons or Pilot balloons. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/pilot_balloons/trial_balloons.
Google Ngram Viewer shows how "pilot balloons" and "trial balloons" have occurred on timeline