A six-letter word for pest is "vermin." Vermin typically refers to various types of troublesome or destructive animals, often associated with disease or nuisance.
Nurseryweb spiders are a pest. They begin with the letters NU.
ant
rodent?
pest
ant
aphid
C-A-R-P-E-T 6-5-2=TEA, is a drink 4-5-2-3=PEAR, is a fruit 1-2-6=CAT, a common house pet 3-2-6=RAT, a common house pest, which is often eaten by a CAT
Benson - 1979 Teacher's Pest 4-6 was released on: USA: 19 November 1982
Crows, aphid
pest, gnat, flea
Pest Man Wins - 1951 was released on: USA: 6 December 1951
No-see-ums are a pest. They are tiny biting flies. They are so tiny that it is hard to see them.