I'm interested in finding English words that, when any one letter is removed, the result is still a valid, correctly-spelled English word. For example, the word "SPAY" is an example of such a word, as "PAY" "SAY", "SPY", and "SPA" are also words. I have an example of a five-letter word, but I'm interested to see what others come up with!
It seems you are looking for
A versatile word. That post contains several examples such as BOATS and LOOPS. A 6 letter example is also given: SHOOTS.