Ladder or Stepladder?

[Tigmafuzz]

Step ladder | Define Step ladder at Dictionary.com

Step ladder
Noun
1. a ladder having flat steps or treads in place of rungs.

2. any ladder, especially a tall one with a hinged frame opening up to form four supporting legs.

We've already established both of these things.

A ladder is something that is leaned against a wall, house, or other solid object. A stepladder is something, like this, that can support itself.

To be a ladder is must have rungs, not steps. If there are steps, then it is a stepladder.

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