| Main Entry: | catching |
| Part of Speech: | adjective |
| Definition: | contagious (disease) |
Synonyms: |
communicable, dangerous, endemic, epidemic, epizootic, infectious, infective, miasmatic, pandemic, pestiferous, pestilential, taking, transferable, transmittable |
Antonyms: |
uncontagious |
| Main Entry: | infectious |
| Part of Speech: | adjective |
| Definition: | catching, spreading |
Synonyms: |
communicable, contagious, contaminating, corrupting, defiling, diseased, epidemic, infective, mephitic, miasmic, noxious, pestilent, pestilential, poisoning, polluting, toxic, transferable, transmittable, virulent, vitiating |
| Notes: | diseases spread by contact are contagious and those spread by air or water are infectious |
Antonyms: |
antiseptic, germless, harmless, non-infectious, uncommunicable, uncontagious |
| Main Entry: | poison/poisonous |
| Part of Speech: | adjective |
| Definition: | harmful |
Synonyms: |
bad, baleful, baneful, corrupt, corruptive, dangerous, deadly, deleterious, destructive, detrimental, evil, fatal, hurtful, infective, lethal, malicious, malignant, mephitic, miasmatic, morbid, mortal, nocuous, noisome, noxious, peccant, pernicious, pestiferous, pestilential, septic, toxic, toxicant, toxiferous, venomous, vicious, viperous, virulent |
Antonyms: |
aiding, antidotal, assisting, curing, healing, helpful |
| Main Entry: | virulent |
| Part of Speech: | adjective |
| Definition: | poisonous, lethal |
Synonyms: |
baneful, deadly, destructive, fatal, harmful, infective, injurious, malign, malignant, mephitic, pernicious, poison, septic, toxic, toxicant, unhealthy, unwholesome, venomous |
Antonyms: |
harmless, healthy, nonpoisonous |
| Main Entry: | poisonous |
| Part of Speech: | adjective |
| Definition: | harmful |
Synonyms: |
bad, baleful, baneful, corrupt, corruptive, dangerous, deadly, deleterious, destructive, detrimental, evil, fatal, hurtful, infective, lethal, malicious, malignant, mephitic, miasmatic, morbid, mortal, nocuous, noisome, noxious, peccant, pernicious, pestiferous, pestilential, poison, septic, toxic, toxicant, toxiferous, venomous, vicious, viperous, virulent |
Antonyms: |
benevolent, harmless, non-toxic |
| Main Entry: | mephitical |
| Part of Speech: | adjective |
| Definition: | poisonous |
Synonyms: |
bad, baleful, baneful, corrupt, corruptive, dangerous, deadly, deleterious, destructive, detrimental, evil, fatal, hurtful, infective, lethal, malicious, malignant, mephitic, miasmatic, morbid, mortal, nocuous, noisome, noxious, peccant, pernicious, pestiferous, pestilential, poison, septic, toxic, toxicant, toxiferous, venomous, vicious, viperous, virulent |
| Main Entry: | pestilential |
| Part of Speech: | adjective |
| Definition: | virulent |
Synonyms: |
baneful, deadly, destructive, fatal, harmful, infective, injurious, malign, malignant, mephitic, noxious, pernicious, pestilent, poison, septic, toxic, toxicant, unhealthy, unwholesome, venomous |
| Main Entry: | toxicant |
| Part of Speech: | adjective |
| Definition: | poisonous |
Synonyms: |
bad*, baleful, baneful, corrupt, corruptive, dangerous, deadly, deleterious, destructive, detrimental, evil, fatal, hurtful, infective, lethal, malicious, malignant, mephitic, mephitical, miasmatic, morbid, mortal, nocuous, noisome, noxious, peccant, pernicious, pestiferous, pestilential, poison, septic, toxic, toxiferous, venomous, vicious, viperous, virulent |