stepstool

/ˈstɛpˌstul/
noun
  1. A small, portable stool with one or more steps, used to reach high places.
    • She used a stepstool to reach the top shelf in the kitchen.
    • The toddler stood on a stepstool to wash his hands at the sink.
    • I keep a stepstool in the garage for changing light bulbs.
Synonyms