Secure
Secure adjective - Having or showing great faith in oneself or one's abilities.
Thick as thieves and secure are semantically related. In some cases you can use "Thick as thieves" instead an adjective "Secure".
Thick as thieves
Secure and thick as thieves are semantically related. Sometimes you can use "Secure" instead an adjective phrase "Thick as thieves".
Cite this Source
Thick as thieves and Secure. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/secure/thick_as_thieves
Secure & Thick as thieves. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/secure/thick_as_thieves>.
Thick as thieves or Secure. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/secure/thick_as_thieves.