21-letter words containing f, e, r, o, s, i
- water of constitution — water present in a molecule that cannot be removed without disrupting the molecule.
- william of malmesbury — William of, William of Malmesbury.
- writ of habeas corpus — law: petition for hearing
- xilinx netlist format — (language, electronics) (XNF) A Hardware Description Language for electronic circuit design, developed by Xilinx, Inc..
- yellow-fever mosquito — a mosquito, Aedes aegypti, that transmits yellow fever and dengue.