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Search Result for "pest": 
Wordnet 3.0

NOUN (4)

1. a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal;
[syn: plague, pestilence, pest, pestis]

2. any epidemic disease with a high death rate;
[syn: plague, pestilence, pest]

3. a persistently annoying person;
[syn: pest, blighter, cuss, pesterer, gadfly]

4. any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.;
- Example: "he sprayed the garden to get rid of pests"
- Example: "many pests have developed resistance to the common pesticides"


The Collaborative International Dictionary of English v.0.48:

Pest \Pest\, n. [L. pestis: cf. F. peste.] 1. A fatal epidemic disease; a pestilence; specif., the plague. [1913 Webster] England's sufferings by that scourge, the pest. --Cowper. [1913 Webster] 2. Anything which resembles a pest; one who, or that which, is troublesome, noxious, mischievous, or destructive; a nuisance. "A pest and public enemy." --South. [1913 Webster]
WordNet (r) 3.0 (2006):

pest n 1: a serious (sometimes fatal) infection of rodents caused by Yersinia pestis and accidentally transmitted to humans by the bite of a flea that has bitten an infected animal [syn: plague, pestilence, pest, pestis] 2: any epidemic disease with a high death rate [syn: plague, pestilence, pest] 3: a persistently annoying person [syn: pest, blighter, cuss, pesterer, gadfly] 4: any unwanted and destructive insect or other animal that attacks food or crops or livestock etc.; "he sprayed the garden to get rid of pests"; "many pests have developed resistance to the common pesticides"
Moby Thesaurus II by Grady Ward, 1.0:

122 Moby Thesaurus words for "pest": affliction, aggravation, ambulatory plague, annoyance, annoyer, bad news, badgerer, bane, bedevilment, besetment, black death, black plague, blast, blight, bore, bother, botheration, bothersomeness, bubonic plague, bugbear, bully, burden, buttonholer, calamity, cancer, canker, cellulocutaneous plague, crashing bore, crushing burden, curse, death, defervescing plague, destruction, devilment, difficulty, disease, dogging, downer, drag, drip, dry rot, dryasdust, dusty, epidemic, epiphytotic, epizootic, evil, exasperation, flat tire, frightful bore, fungus, gadfly, glandular plague, grievance, harasser, harassment, harm, harrier, harrying, headache, heckler, hemorrhagic plague, hounding, humdrum, infliction, irritant, larval plague, mildew, mold, molestation, moth, moth and rust, murrain, must, nag, nemesis, nudnik, nudzh, nuisance, open wound, pandemia, pandemic, persecution, persecutor, pester, pesterer, pesthole, pestilence, pill, plague, plague spot, plaguer, pneumonic plague, premonitory plague, problem, proser, rot, running sore, rust, sadist, scourge, septicemic plague, siderating plague, smut, tease, teaser, thorn, torment, tormentor, trial, trouble, tuberculosis, twaddler, vexation, vexatiousness, visitation, wet blanket, white plague, woe, worm, worriment, worry
V.E.R.A. -- Virtual Entity of Relevant Acronyms (September 2014):

PEST Parameter Estimation by Sequential Testing