23-letter words containing a, h, e, d, f
- twenty-fourth amendment — an amendment to the U.S. Constitution, ratified in 1964, forbidding the use of the poll tax as a requirement for voting in national or U.S. Congressional elections.
- united church of canada — the largest Protestant denomination in Canada, formed in the 1920s by incorporating some Presbyterians and most Methodists
- urea-formaldehyde resin — any of a group of resins formed by the interaction of urea and formaldehyde under conditions that include heat and pH control: used chiefly in the manufacture of buttons, baking enamels, and for making fabrics wrinkle-resistant.