76 entries under difficult topic. ×

19
plodding(adjective, hard, complex)
19
serious(adjective, hard, harsh, cruel)
19
sticky(adjective, hard, complex, awkward)
19
thorny(adjective, hard, complex)
19
tight(adjective, hard, complex)
19
toilful(adjective, hard, complex, awkward)
19
tough(adjective, hard, complex)
19
weighty(adjective, hard, complex)
18
hard-nosed(adjective, hard, complex, severity)
18
intricate(adjective, hard, complex, awkward)
18
operose(adjective, hard, complex, awkward)
18
sore(adjective, hard, pain, complex)
8
wearing(noun, verb, adjective, tough, rough)
7
harsh(adjective, pain, severity)
7
onerous(adjective, tough, rough, heavy)
5
wearying(adjective, tough, rough, heavy)
3
heavy(adjective, severe, rough, harsh)
3
troublesome(adjective, rough, harsh, heavy)
3
uphill(adjective, tough, rough, heavy)
3
wearisome(adjective, tough, rough, heavy)
11 years ago|7.4k views|share |citing 
APASmart Define. (2015). grinding thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/grinding/thesaurus/synonyms
ChicagoSmart Define. 2015. "grinding thesaurus" https://smartdefine.org/grinding/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, grinding thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/grinding/thesaurus/synonyms>.
MLASmart Define. "grinding thesaurus" 10 April 2015. Web. 21 September 2026. <https://smartdefine.org/grinding/thesaurus/synonyms>