Poisonous
Poisonous adjective - Containing or contaminated with a substance capable of injuring or killing a living thing.
Tough as old boots and poisonous are semantically related. In some cases you can use "Tough as old boots" instead an adjective "Poisonous".
Tough as old boots
Poisonous and tough as old boots are semantically related. You can use "Poisonous" instead an adjective phrase "Tough as old boots".
Cite this Source
Tough as old boots and Poisonous. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/poisonous/tough_as_old_boots
Poisonous & Tough as old boots. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/poisonous/tough_as_old_boots>.
Tough as old boots or Poisonous. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/poisonous/tough_as_old_boots.