6
fallacious(adjective, reasoning)
6
illogical(adjective, sense, reasoning, unsystematic)
5
inconsistent
5
invalid(adjective, reasoning, worthless, unfounded)
5
irrational(adjective, unsystematic)
5
unreasonable(adjective, reasoning)
4
inconsequent
4
inconsequential
3
false(adjective, reasoning)
3
inconclusive
3
loose
3
nonscientific
3
pseudoscientific
2
absonant
2
approximate(adjective, inexact)
2
groundless
2
incorrect
2
not following(expression, idiom, reasoning)
2
specious
2
unsound(adjective, reasoning)
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APASmart Define. (2015). unscientific thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/unscientific/thesaurus/synonyms
ChicagoSmart Define. 2015. "unscientific thesaurus" https://smartdefine.org/unscientific/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, unscientific thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/unscientific/thesaurus/synonyms>.
MLASmart Define. "unscientific thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/unscientific/thesaurus/synonyms>