We don't have synonyms for excipients yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are excipient, recipients and percipients.
(n) :
(pharmacy, pharmacology) An ingredient that is intentionally added to a drug for purposes other than the therapeutic or diagnostic effect at the intended dosage.
(n) :
(pharmacy, pharmacology) An ingredient that is intentionally added to a drug for purposes other than the therapeutic or diagnostic effect at the intended dosage.