| noun | process of changing to an inferior state |
| noun | changing something with the result that it becomes worse |
| verb | grow worse “Conditions in the slum worsened” |
| verb | make worse “This drug aggravates the pain” |
| adjective | changing for the worse “worried by the worsening storm” |
| deteriorate | verb | become worse or disintegrate |
| decline | verb | grow worse |
| worsen | verb | grow worse |
| worsening | noun | process of changing to an inferior state |
| decline | noun | a condition inferior to an earlier condition; a gradual falling off from a better state |
| declension | noun | process of changing to an inferior state |
| declination | noun | a condition inferior to an earlier condition; a gradual falling off from a better state |
| aggravation | noun | action that makes a problem or a disease (or its symptoms) worse |
| exacerbation | noun | action that makes a problem or a disease (or its symptoms) worse |