Synonyms|768Antonyms|230|Broader|9Narrower|0Related|1.3k

59 entries under heavy topic. ×

2
nasty(adjective, bad, hard, rough, difficult)
2
profound(hard, delicate, intense, complex)
2
slavish(adjective, tough, rough, difficult)
2
tiring(adjective, hard, tough, severe, rough)
1
bad(awful, terrible, disgusting, shocking)
1
fatiguing(adjective, hard, tough, severe, rough)
1
grueling(adjective, hard, tough, severe, difficult)
1
irksome(adjective, tough, severe, difficulty, rough)
1
merciless(adjective, appearance, tough, severe, rough)
1
toilful(adjective, tough, rough, difficult)
1
touchy(bad, irritable, risky, dangerous)
1
uphill battle(expression, adjective, tough, rough, difficult)
1
vexatious(adjective, hard, severe, evil, rough)
0
austere(appearance, severe, harsh, terrible)
0
excessive(great, severe, harsh, painful)
0
exigent
0
intense(great, fierce, huge, massive)
0
scabrous(adjective, tough, rough, difficult)
0
unsparing(adjective, tough, rough, difficult)
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APASmart Define. (2015). formidable thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/formidable/thesaurus/synonyms
ChicagoSmart Define. 2015. "formidable thesaurus" https://smartdefine.org/formidable/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, formidable thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/formidable/thesaurus/synonyms>.
MLASmart Define. "formidable thesaurus" 17 July 2015. Web. 23 September 2026. <https://smartdefine.org/formidable/thesaurus/synonyms>