3
lawfully
3
legally
2
fairly
2
legitimately
2
licitly
1
clean(adverb, unfairly)
1
cleanly
1
permissibly
1
technically
0
absolutely
0
admissibly
0
allowably
0
apparently
0
aright
0
artlessly
0
authentically
0
blankly
0
by law
0
candidly
0
clearly
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APASmart Define. (2015). illegally thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/illegally/thesaurus/antonyms
ChicagoSmart Define. 2015. "illegally thesaurus" https://smartdefine.org/illegally/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, illegally thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/illegally/thesaurus/antonyms>.
MLASmart Define. "illegally thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/illegally/thesaurus/antonyms>