Household pests are a common problem for many homeowners. Roaches (5 letters), cockroaches (9 letters), ants (3 letters), silverfish (10 letters) and red ants (6 letters) are some of the most common household pests. Roaches are small, dark-colored insects that can be found in kitchens and bathrooms. Cockroaches are larger than roaches and have wings. Ants are small, black or brown insects that often form large colonies. Silverfish are small, wingless insects that feed on paper and fabric. Red ants are small, reddish-brown insects that are often found in gardens. All of these pests can cause damage to property and should be dealt with quickly.