Anacolpate is an uncommon word, referring to ferns with the fertilization process taking place outside of a protective enclosure. Some synonyms for anacolpate include exannulate, exindusiate, and exannulate. These words describe ferns that don't have a ring or a protective covering around their spore-producing structures. Other synonyms for this word include acrostichoid, dryopteroid, or polypodioid ferns. These ferns are unique in their fertilization process, making them stand out from other types of plants. Although not encountered often, these synonyms are helpful for botanists and those looking to expand their vocabulary.