A dome is a structure that is typically round or oval in shape and is often used as a ROOF or CEILING. The crossword solutions for the term 'dome' include 'CEILING' (7 letters), 'ARCH' (4 letters), 'HEAD' (4 letters), 'ROOF' (4 letters), 'NOB' (3 letters), 'VAULT' (5 letters), 'PATE' (4 letters), and 'CUPOLA' (6 letters). An ARCH is a curved structure that forms an opening, while a HEAD is the topmost part of a structure. A NOB is a small rounded protuberance, and a VAULT is an arched structure that is often used as a CEILING or ROOF. A PATE is the top of a dome, and a CUPOLA is a small dome-like structure that is often placed on top of a larger dome. Finally, an ONION dome is a type of dome that is shaped like an ONION and is commonly found in Eastern European architecture.