Synonyms|72Antonyms|0|Broader|4Narrower|0Related|12
1
codeine
1
codeine cough syrup(expression, idiom)
1
depressant
1
depressor
1
dolly
1
downer
1
goofball
1
hard stuff
1
heroin
1
hop
1
hypnotic
1
junk
1
knockout drops
1
laudanum
1
liquor
1
lotus
1
meperidine
1
methadone
1
morphia
1
morphine
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APASmart Define. (2015). phenobarbital thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/phenobarbital/thesaurus/synonyms
ChicagoSmart Define. 2015. "phenobarbital thesaurus" https://smartdefine.org/phenobarbital/thesaurus/synonyms (accessed September 25, 2026).
HarvardSmart Define 2015, phenobarbital thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/phenobarbital/thesaurus/synonyms>.
MLASmart Define. "phenobarbital thesaurus" 14 April 2015. Web. 25 September 2026. <https://smartdefine.org/phenobarbital/thesaurus/synonyms>