Regex - How to search for singular or plural version of word [duplicate]

Answer 1

Ok I've found a solution:

([a-zA-Z]+?)(s\b|\b)

Works as desired, then you can simply use the first match as the unpluralized version of the word.

Thanks @Jahroy for helping me find it. I added this as answer for future surfers who just want a solution but please check out Jahroy's comment for more in depth information.