Costless
Costless adjective - Not costing or charging anything.
Spontaneous and costless are semantically related. in free topic. In some cases you can use "Spontaneous" instead an adjective "Costless".
Spontaneous
Spontaneous adjective - Done instantly and without conscious thought or decision.
Costless and spontaneous are semantically related. You can use "Costless" instead an adjective "Spontaneous".
Nearby Words: spontaneity, spontaneously
Cite this Source
Spontaneous and Costless. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/costless/spontaneous
Costless & Spontaneous. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/costless/spontaneous>.
Spontaneous or Costless. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/costless/spontaneous.
Google Ngram Viewer shows how "costless" and "spontaneous" have occurred on timeline