| 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: | 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: | communicable |
| Part of Speech: | adjective |
| Definition: | able to be contracted |
Synonyms: |
catching, communicative, contagious, expansive, infectious, pandemic, taking, transferable, transmittable |
Antonyms: |
incontractable, noncommunicable, noncontagious |
| Main Entry: | contagious |
| Part of Speech: | adjective |
| Definition: | communicable |
Synonyms: |
catching, deadly, endemic, epidemic, epizootic, impartible, infectious, inoculable, pestiferous, pestilential, poisonous, spreading, taking, transmissible, transmittable |
| Notes: | diseases spread by contact are contagious and those spread by air or water are infectious |
Antonyms: |
noncommunicable |
| Main Entry: | diseased |
| Part of Speech: | adjective |
| Definition: | unhealthy |
Synonyms: |
afflicted, ailing, indisposed, infected, infectious, infirm, rotten, sick, sickly, tainted, unsound, unwell, unwholesome |
Antonyms: |
fit, healthy |
| Main Entry: | epidemic |
| Part of Speech: | adjective |
| Definition: | widespread |
Synonyms: |
catching, communicable, contagious, endemic, general, infectious, pandemic, prevailing, prevalent, rampant, rife, sweeping, wide-ranging |
Antonyms: |
limited |
| Main Entry: | pestilent/pestilential |
| Part of Speech: | adjective |
| Definition: | dangerous, |
Synonyms: |
contagious, contaminating, corrupting, deadly, deleterious, destructive, detrimental, diseased, evil, fatal, harmful baneful, infectious, injurious, lethal, mortal, noxious, pernicious, pestiferous, ruinous, tainting, troublesome, vicious |
Antonyms: |
clean, healthy, hygienic, safe, sanitary |
| Main Entry: | pestilent |
| Part of Speech: | adjective |
| Definition: | dangerous |
Synonyms: |
baneful, contagious, contaminating, corrupting, deadly, deleterious, destructive, detrimental, diseased, evil, fatal, harmful, infectious, injurious, lethal, mortal, noxious, pernicious, pestiferous, pestilential, ruinous, tainting, troublesome, vicious |
| Main Entry: | pestiferous |
| Part of Speech: | adjective |
| Definition: | annoying |
Synonyms: |
bothersome, contagious, diseased, harmful, infectious, noisome, noxious, pernicious, pestilential, toxic, unhealthy, virulent |
| Main Entry: | taking |
| Part of Speech: | adjective |
| Definition: | communicable |
Synonyms: |
catching, communicative, contagious, expansive, infectious, pandemic, transferable, transmittable |