| Similarity | Rank | |
|---|---|---|
| epidemic | 0.794 | 9792 |
| an_outbreak | 0.672 | 99315 |
| pandemic | 0.667 | 26455 |
| outbreak | 0.635 | 10943 |
| an_outbreak_of | 0.626 | 92417 |
| cholera | 0.621 | 27526 |
| plague | 0.584 | 9635 |
| the_Ebola_virus | 0.580 | 74773 |
| disease_outbreak | 0.577 | 90918 |
| outbreak_of | 0.574 | 54409 |
| smallpox | 0.563 | 53441 |
| Ebola | 0.561 | 11439 |
| influenza | 0.559 | 26018 |
| swine_flu | 0.551 | 73020 |
| dengue | 0.551 | 47346 |
| communicable_disease | 0.545 | 59999 |
| measles | 0.543 | 26034 |
| disease | 0.542 | 971 |
| H1N1 | 0.542 | 92062 |
| a_catastrophe | 0.538 | 66680 |
| syphilis | 0.536 | 46815 |
| HIV_infection | 0.534 | 29645 |
| dengue_fever | 0.533 | 87089 |
| contagion | 0.528 | 45632 |
| an_illness | 0.526 | 62298 |