10 entries under gratuitous topic. ×

14
free(adjective, charge, courtesy, spontaneous)
12
gratis(adjective, free, courtesy, spontaneous, paper)
11
complimentary(adjective, free, spontaneous, paper)
3
for nothing(expression, adjective, idiom, free, paper)
3
free of charge(expression, adjective, idiom, free, courtesy)
2
for love(expression, adjective, free, paper)
2
freebie(adjective, free, paper, comp)
2
without charge(expression, adjective, idiom, free, paper)
1
chargeless(adjective, free, courtesy, spontaneous, paper)
1
free ride(expression, adjective, free, paper)
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APASmart Define. (2015). costless thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/costless/thesaurus/synonyms
ChicagoSmart Define. 2015. "costless thesaurus" https://smartdefine.org/costless/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, costless thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/costless/thesaurus/synonyms>.
MLASmart Define. "costless thesaurus" 14 April 2015. Web. 24 September 2026. <https://smartdefine.org/costless/thesaurus/synonyms>