We don't have synonyms for pantyliner yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are pantyline, panty liner and pantiliner.
(n) :
A pad worn on the inner surface of women's underpants, up against the vulva, during a low-flow day of the menstrual period, designed to absorb small, spotty quantities of menstrual fluid, in contrast to a tampon or sanitary napkin, worn on heavy-flow days.
(n) :
A similar product designed to absorb urine for women with light bladder leakage.
(n) :
A pad worn on the inner surface of women's underpants, up against the vulva, during a low-flow day of the menstrual period, designed to absorb small, spotty quantities of menstrual fluid, in contrast to a tampon or sanitary napkin, worn on heavy-flow days.
(n) :
A similar product designed to absorb urine for women with light bladder leakage.