67 entries under expression topic. ×

6
de rigueur(adjective, right, essential, required)
4
called for(verb, phrasal verb, right, essential)
4
of the essence(adjective, idiom, important, essential)
4
sine qua non(noun, idiom, need, essential)
3
rest room(idiom, receptacle)
2
ask for(verb, phrasal verb, requirement)
2
in demand(adjective, idiom, basic, main)
2
incumbent on(adjective, essential, required, obligatory)
1
clear and distinct
1
clear as day
1
holding together(clear, sound, reasonable, sensible)
1
holding water(clear, sound, reasonable, sensible)
1
life or death(noun, idiom, need, essential)
1
mattering much(big, significant, substantial, valuable)
1
most likely(clear, sound, reasonable, sensible)
1
name of game(adjective, idiom, essential, required)
1
no alternative(noun, need, essential, requirement)
1
no choice(noun, need, essential, requirement)
1
of moment(big, significant, substantial, valuable)
1
of note(big, significant, substantial, valuable)
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APASmart Define. (2015). necessary thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/necessary/thesaurus/synonyms
ChicagoSmart Define. 2015. "necessary thesaurus" https://smartdefine.org/necessary/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, necessary thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/necessary/thesaurus/synonyms>.
MLASmart Define. "necessary thesaurus" 2 November 2015. Web. 20 September 2026. <https://smartdefine.org/necessary/thesaurus/synonyms>