The term 'Tiny LOUSE' is composed of two words, the first being 'NIT', which is a three letter word. NIT is a term used to refer to the eggs of lice, which are tiny parasitic insects that feed on the blood of humans and other animals. The second word, 'LOUSE', refers to the adult form of the insect. Lice are usually found in the hair and clothing of humans, and can cause itching and irritation. Tiny lice are particularly difficult to detect and remove, making them a nuisance to those affected by them.