Pests are organisms that cause harm to humans, animals, and plants. NUDNIKS (7 letters) are people who are annoying and disruptive. Annoyances (10 letters) are things that cause irritation or frustration. NOODGES (7 letters) are people who persistently urge someone to do something. VERMIN (6 letters) are small animals that are considered pests, such as rats and mice. Nuisances (9 letters) are anything that is annoying or troublesome. LICE (4 letters) are small insects that live on the skin of humans and animals. FLIES (5 letters) are small flying insects that can spread disease. All of these terms are related to the term 'pests' and describe different types of organisms that can cause harm.