Synonyms|367Antonyms|96|Broader|9Narrower|15Related|697

181 entries under adjective topic. ×

7
significative(importance, valuable, main, notable)
7
unlucky(black, warn, luck, baleful)
6
alarming(fear, exciting, foreboding)
6
augural(awful, fear, black, exciting)
6
awesome(feature, impression, awe)
6
awful
6
considerable(importance, main, extremely significant)
6
extraordinary(exciting, foreboding)
6
major
6
miraculous
6
overblown
6
premonitory(exciting, foreboding, threatening, prediction)
6
stupendous
6
unfavourable
6
unpropitious
6
wondrous
5
apocalyptic(exciting, foreboding, warn, luck)
5
astonishing
5
bodeful(awful, fear, black, horror)
5
critical(bad, big, heavy, significant)
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ChicagoSmart Define. 2015. "portentous thesaurus" https://smartdefine.org/portentous/thesaurus/synonyms (accessed September 29, 2026).
HarvardSmart Define 2015, portentous thesaurus, Smart Define, viewed 29 September, 2026, <https://smartdefine.org/portentous/thesaurus/synonyms>.
MLASmart Define. "portentous thesaurus" 10 April 2015. Web. 29 September 2026. <https://smartdefine.org/portentous/thesaurus/synonyms>