Synonyms|367Antonyms|96|Broader|9Narrower|15Related|697
2
premonitory
1
admonishing
1
doomed
1
extraordinary
1
momentous
1
ominous
1
oracular
1
prognostic
1
prophetic
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HarvardSmart Define 2015, portentous thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/portentous/thesaurus/broader>.
MLASmart Define. "portentous thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/portentous/thesaurus/broader>