Regex Editor & Tester

This regex uses a positive lookahead to match words beginning with either 'leaf' or 'gutter', capturing the matched prefix separately. It's designed for searching email subjects or text content for terms related to these base words, such as 'leaflet', 'leaves', 'gutters', or 'guttering'. The pattern works with case-insensitive matching and will find all occurrences in the text.