infester
One causing infestation
One who infests—a creature or entity that invades and occupies a space in unwanted numbers.
The word appears rarely, usually in contexts describing pests or parasites: The rats were the chief infesters of the grain stores.
Sometimes used figuratively for people who persistently inhabit or overrun a place.
Harmful small animals
- rodentsGnawing mammal order
- insectsSix-legged arthropods
- cockroachesHardy household insect pests
- termitesWood-eating social insects
ants · locusts · weevils · bedbugs · mites · aphids · mosquitoes · flies
One receiving guests
- leechBlood-feeding aquatic worm
- tapewormSegmented intestinal parasite
- nematodeThreadlike parasitic worm
- ectoparasiteOrganism feeding on host externally
endoparasite · bloodsucker · lice · fleas · ticks · hookworm · roundworm · mite
Disease-causing microorganism
- virusMicroscopic infectious agent
- bacteriaNucleus-free single-celled organisms
- infectionPathogen invasion causing illness
- contagionDisease spread by contact
epidemic · pandemic · plague · microbe · germ · outbreak · transmission · contamination
Gradual intrusion on territory
- infiltrationCovert entry into organization
- intrusionUnauthorized entry into space
- overrunSpread throughout uncontrollably
- incursionHostile territorial penetration
occupation · takeover · spreading · colonizing · establishing · proliferation · overwhelming · swarming
vermin
Harmful small animals
- rodentsGnawing mammal order
- insectsSix-legged arthropods
- cockroachesHardy household insect pests
termites · ants · locusts · weevils · bedbugs · mites · aphids · mosquitoes · flies · silverfish
host
One receiving guests
- leechBlood-feeding aquatic worm
- tapewormSegmented intestinal parasite
- nematodeThreadlike parasitic worm
ectoparasite · endoparasite · bloodsucker · lice · fleas · ticks · hookworm · roundworm · mite · scabies
pathogen
Disease-causing microorganism
- virusMicroscopic infectious agent
- bacteriaNucleus-free single-celled organisms
- infectionPathogen invasion causing illness
contagion · epidemic · pandemic · plague · microbe · germ · outbreak · transmission · contamination · affliction
encroachment
Gradual intrusion on territory
- infiltrationCovert entry into organization
- intrusionUnauthorized entry into space
- overrunSpread throughout uncontrollably
incursion · occupation · takeover · spreading · colonizing · establishing · proliferation · overwhelming · swarming · penetration
nuisance
Cause of aggravation
- intruderUnauthorized person present
- interloperOne who enters uninvited
- squatterUnauthorized building inhabitant
unwelcome · uninvited · meddler · disruptor · annoyance · bother · hindrance · imposition · usurper · invader
infesterbenefactor
One who gives aid
caretaker · nurturer · cultivator · guardian · steward
infesterexterminator
One who eradicates vermin
defender · protector · eradicator · pest controller · fumigator
- pest infestationHarmful organisms colonizing space
- flea infestationParasitic insect outbreak
- insect infestationHarmful bug population explosion
- lice infestationParasitic scalp colonization
- tick infestationExcessive parasitic arachnid presence
infested, infest, infestation, infests, infesting, disinfesting, disinfested, uninfested