- Definitions|2
- Thesaurus|1.1k
- Abbreviations|0
| significative(adjective, importance, valuable, main, notable) | |
| unlucky(adjective, black, warn, luck, baleful) | |
| alarming(adjective, fear, exciting, foreboding) | |
| augural(adjective, awful, fear, black, exciting) | |
| awesome(adjective, feature, impression, awe) | |
| awful(adjective, fear) | |
| considerable(adjective, importance, main, extremely significant) | |
| extraordinary(adjective, exciting, foreboding) | |
| forewarning | |
| major(adjective, momentous) | |
| miraculous | |
| overblown | |
| premonitory(adjective, exciting, foreboding, threatening, prediction) | |
| stupendous | |
| unfavourable | |
| unpropitious | |
| wondrous(adjective, extraordinary) | |
| apocalyptic(adjective, exciting, foreboding, warn, luck) | |
| astonishing | |
| bodeful(adjective, awful, fear, black, horror) |
For more, visit
Portentous on
Power Thesaurus
| APA | Smart Define. (2015). portentous thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/portentous/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "portentous thesaurus" https://smartdefine.org/portentous/thesaurus/synonyms (accessed September 28, 2026). |
| Harvard | Smart Define 2015, portentous thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/portentous/thesaurus/synonyms>. |
| MLA | Smart Define. "portentous thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/portentous/thesaurus/synonyms> |