| EIGHTH | • eighth adj. The ordinal form of the number eight. • eighth n. The person or thing in the eighth position. • eighth n. One of eight equal parts of a whole. | 
| HIGHTH | • highth n. Obsolete form of height. • HIGHTH n. (archaic) height, also HEIGHTH. | 
| EIGHTHS | • eighths n. Plural of eighth. • EIGHTH n. one of eight equal parts. | 
| HEIGHTH | • heighth n. (Obsolete outside US dialects, now proscribed) Alternative form of height. • HEIGHTH n. (archaic) height, also HIGHTH. | 
| HIGHTHS | • highths n. Plural of highth. • HIGHTH n. (archaic) height, also HEIGHTH. | 
| EIGHTHLY | • eighthly adv. In the eighth place; eighth in a row. • EIGHTHLY adv. in the eighth place. | 
| HEIGHTHS | • heighths n. Plural of heighth. • HEIGHTH n. (archaic) height, also HIGHTH. | 
| NIGHTHAWK | • nighthawk n. (UK, regional) A nightjar, especially Caprimulgus europaeus (Eurasian nightjar). • nighthawk n. (US) A New World nightjar of the genus Chordeiles, especially Chordeiles minor. • nighthawk n. A person whose preference or custom is to remain awake and active during the night and the early morning hours. | 
| KNIGHTHEAD | • knighthead n. A mitred backing timber which extends the after line of the rabbet in the stem to give extra support… • knighthead n. A bollard or bitt. • knighthead n. Either of two timbers rising from the keel of a sailing ship and supporting the inner end of the bowsprit. | 
| KNIGHTHOOD | • knighthood n. An honour whereby one is made into a knight, and one can thereafter be called "Sir". • knighthood n. The quality of being a knight. • knighthood n. The knights collectively, the body of knights. | 
| LIGHTHOUSE | • lighthouse n. A tower or other structure exhibiting a light or lights to warn or guide sailors. • LIGHTHOUSE n. a structure (as a tower) with a powerful light that gives a continuous or intermittent signal to navigators. | 
| NIGHTHAWKS | • nighthawks n. Plural of nighthawk. • night␣hawks n. Plural of night hawk. • NIGHTHAWK n. the American nightjar. | 
| KNIGHTHEADS | • knightheads n. Plural of knighthead. • KNIGHTHEAD n. either of a pair of vertical supports for the bowsprit. | 
| KNIGHTHOODS | • knighthoods n. Plural of knighthood. • KNIGHTHOOD n. the rank of a knight. | 
| LIGHTHOUSES | • lighthouses n. Plural of lighthouse. • LIGHTHOUSE n. a structure (as a tower) with a powerful light that gives a continuous or intermittent signal to navigators. | 
| LIGHTHEARTED | • lighthearted adj. Joyful, glad, taking pleasure in being alive; not depressed or sad. • lighthearted adj. Enjoyably lacking of seriousness, not grave. • light-hearted adj. Alternative spelling of lighthearted. | 
| LIGHTHOUSEMAN | • lighthouseman n. The keeper of a lighthouse. • LIGHTHOUSEMAN n. one who keeps a lighthouse. | 
| LIGHTHOUSEMEN | • lighthousemen n. Plural of lighthouseman. • LIGHTHOUSEMAN n. one who keeps a lighthouse. | 
| LIGHTHEARTEDLY | • lightheartedly adv. In a lighthearted manner, cheerfully, with joy. • light-heartedly adv. Alternative form of lightheartedly. • LIGHTHEARTED adv. free from care. |