| portentous(adjective, importance, significant, valuable, black) |
| momentous(adjective, importance, important, significant, valuable) |
| disastrous(adjective, help, black, deadly, detrimental) |
| foreboding(adjective, black, warning, threatening, unfavorable) |
| grave(adjective, tough, severe, importance, important) |
| ominous(adjective, significant, grave, foreboding, threatening) |
| consequential(adjective, importance, valuable, main, notable) |
| fatal(adjective, help, important, decide, critical) |
| weighty(adjective, importance, valuable, main, notable) |
| calamitous(adjective, help, sad, awful, gloomy) |
| crucial(adjective, severe, important, lively, significant) |
| decisive(adjective, important, lively, significant, definite) |
| inauspicious(adjective, significant, black, threatening, menacing) |
| serious(adjective, importance, valuable, main, notable) |
| ruinous(adjective, help, deadly, fatal, devastating) |
| destructive(adjective, help, deadly, fatal, arouse bad emotions) |
| essential(adjective, importance, valuable, main, notable) |
| vital(adjective, importance, valuable, main, notable) |
| big(adjective, importance, valuable, main, notable) |
| critical(adjective, important, lively, significant, exciting) |