serious
WordReference English Thesaurus © 2025
Sense: Adjective: dangerous
Synonyms:
grave Collocations, severe Collocations, grievous, pressing Collocations, dangerous Collocations, perilous, hazardous Collocations, risky Collocations, unsafe, threatening Collocations, menacing, life-threatening, life-and-death
Sense: Adjective: important
Synonyms:
important Collocations, significant Collocations, no joking matter, no joke, crucial Collocations, critical Collocations, life-and-death, high-priority, consequential, major Collocations, vital Collocations, weighty, heavy Collocations
Sense: Adjective: involving earnestness
Synonyms:
earnest Collocations, solemn, grave Collocations, weighty, sober Collocations, no-nonsense, severe Collocations