Venomous vs. Poisonous

synonyms

In this lesson, we're gonna analyze the differences and similarities between these two adjective. Do you have any presuppositions? Well, come on.

What Is Their Main Difference?

Both indicate something toxic that can cause serious injuries or lead to death. However, 'venomous' describes animals that have a toxic substance within called 'venom'. Examples of these animals are snakes, spiders, some fish, etc. 'Posonous' is more about different natural or chemical substances that are harmful.

Differences

As mentioned above, 'venomous' describes animals that have venom in their blood. Snakes, spiders, some fish, etc. go under this category. If a living creature is stung, they will be seriously injured or it might even lead to death. Look at the examples below:

Not all snakes are venomous.

I never understood why such venomous creatures existed in nature.

'Poisonous', however, refers to any kind of food, containing a toxic substance within called 'poison'. Certain substances like 'cyanide' are 'poisonous'. Check out the examples below:

What if this drink is poisonous?

How would you tell if this mushroom is poisonous or not?

Similarities

Both indicate something toxic and lethal. Look at the examples below:

Such poisonous substances shouldn't be allowed to be scattered on the desk like this.

The venomous snake muttered something to me and winked.

Are They Interchangeable?

Most native speakers usually use these two words interchangeably. Although, it is important to remember that 'venomous' is more about animals than 'poisonous'. Compare:

✓ Regardless of how poisonous these creatures are, you are never allowed to kill them.

✓ Regardless of how venomous these creatures are, you are never allowed to kill them.

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