The term LARGE FERN can be solved by the crossword solution BRACKEN, which is a seven-letter word. BRACKEN is a large, coarse fern that is native to temperate regions of the Northern Hemisphere. It is one of the most common ferns in the world and is found in many different habitats, including grasslands, woodlands, and wetlands. BRACKEN is also known for its ability to spread quickly and can become a nuisance in some areas.