140 entries under complex topic. ×

1
formidable(adjective, hard, rough, difficult)
1
gasser(adjective, hard, fancy, difficult)
1
hi-tech(adjective, hard, fancy, difficult)
1
hidden(obscure, sophisticated, complicated, indirect)
1
high-tech(adjective, difficult, sophisticated, elaborate)
1
interlaced(adjective, hard, fancy, difficult)
1
labored(adjective, tough, rough, difficult, heavy)
1
mega factor(expression, adjective, hard, fancy, difficult)
1
minute(adjective, complicated, detailed, intricate)
1
mystical(hard, obscure, tricky, complicated)
1
nice(adjective, hard, delicate, loose)
1
painstaking(adjective, complicated, detailed, intricate)
1
studied(verb, adjective, complicated, detailed)
1
terrible(adjective, tough, rough, difficult, heavy)
1
thorough(adjective, complicated, detailed, intricate)
1
unclear(adjective, hard, delicate, loose)
1
unintelligible(adjective, hard, delicate, loose)
1
uphill(adjective, tough, rough, difficult, heavy)
1
various(adjective, hard, fancy, difficult)
1
wheels within wheels(expression, adjective, idiom, hard, fancy)
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APASmart Define. (2015). involved thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/involved/thesaurus/synonyms
ChicagoSmart Define. 2015. "involved thesaurus" https://smartdefine.org/involved/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, involved thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/involved/thesaurus/synonyms>.
MLASmart Define. "involved thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/involved/thesaurus/synonyms>