The term 'Nighttime Biter' can be summarized by the crossword solution of 'BEDBUG', which is a six-letter word. Bedbugs are small, parasitic insects that feed on the blood of humans and animals while they sleep. They are most active at night, hence the name 'Nighttime Biter'. Bedbugs are found in many places, including homes, hotels, and other dwellings. They can be difficult to get rid of, as they can hide in small crevices and reproduce quickly.