97 entries under adjective topic. ×

1
sobering(tough, severe, important, significant)
1
strictly business(expression, tough, severe, important)
1
unamusing(tough, severe, important, significant)
1
unhumorous(tough, severe, important, deep)
1
wearing(hard, tough, rough, difficult)
1
worrying(tough, severe, important, significant)
0
awkward(difficult, demanding, grueling, problematical)
0
back-breaking
0
distressing(tough, rough, difficult, heavy)
0
merciless(tough, rough, difficult, heavy)
0
problematical(difficult, awkward, demanding, grueling)
0
scabrous(tough, rough, difficult, heavy)
0
terrible(tough, rough, difficult, heavy)
0
testing(tough, severe, difficult, violent)
0
unsparing(tough, rough, difficult, heavy)
0
uphill battle(expression, tough, rough, difficult)
0
wearying(tough, rough, difficult, heavy)
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APASmart Define. (2015). operose thesaurus. Retrieved September 26, 2026, from https://smartdefine.org/operose/thesaurus/synonyms
ChicagoSmart Define. 2015. "operose thesaurus" https://smartdefine.org/operose/thesaurus/synonyms (accessed September 26, 2026).
HarvardSmart Define 2015, operose thesaurus, Smart Define, viewed 26 September, 2026, <https://smartdefine.org/operose/thesaurus/synonyms>.
MLASmart Define. "operose thesaurus" 10 April 2015. Web. 26 September 2026. <https://smartdefine.org/operose/thesaurus/synonyms>