5
toughness(noun, difficulty)
1
difficultness
1
difficulty(noun, difficulty)
1
formidableness
1
hardness(noun, difficulty)
1
huskiness
1
ruggedness
1
wearying
0
adversity
0
anger
0
arduousness
0
cantankerousness
0
character
0
complexity
0
complication
0
condition
0
contrariness
0
cumbersomeness
0
disposition
0
energy
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APASmart Define. (2013). formidability thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/formidability/thesaurus/synonyms
ChicagoSmart Define. 2013. "formidability thesaurus" https://smartdefine.org/formidability/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, formidability thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/formidability/thesaurus/synonyms>.
MLASmart Define. "formidability thesaurus" 27 June 2013. Web. 20 September 2026. <https://smartdefine.org/formidability/thesaurus/synonyms>