Based on the infamous Word Ladder puzzle created by Lewis Carroll, Word Staircase lets you build a staircase of ever-longer words. Take an existing word, rearrange the letters and add an extra letter to spell a new word. Create a staircase going from a three letter word upwards. Clues will help you identify the new word.

To go from "ace" to "depreciations" you might do the following:

ACE
RACE
SCARE
NACRES
CARNIES
INCREASE
ARDENCIES
DEACONRIES
DESECRATION
DEPRECATIONS
DEPRECIATIONS

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All words are guaranteed to exist on Dictionary.com.

No confusion between UK and US spellings. Clues and answers will not contain any words such as colour/color for which spelling varies from country to country.