Synonyms|266Antonyms|5|Broader|1Narrower|0Related|77
10
voiceless(adjective, inaudible)
6
hard
6
unvoiced
5
irrational(adjective, number)
4
deaf
4
mute
3
decimal
3
earless
3
finite
3
fraction
3
imaginary
3
impossible
3
infinite
3
irrational number(expression, idiom, number)
3
negative
3
positive
3
prime
3
radical
3
rational
3
real
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APASmart Define. (2015). surd thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/surd/thesaurus/synonyms
ChicagoSmart Define. 2015. "surd thesaurus" https://smartdefine.org/surd/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2015, surd thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/surd/thesaurus/synonyms>.
MLASmart Define. "surd thesaurus" 10 April 2015. Web. 20 September 2026. <https://smartdefine.org/surd/thesaurus/synonyms>