We don't have synonyms for carpels yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are carpel, carpets and carpals.
(n) :
(botany) A constituent part of a flower pistil: the female reproductive organs in a flower. A carpel is composed of an ovary, a style, and a stigma, although some flowers have carpels without a distinct style. In origin, carpels are leaves (megasporophylls) that have evolved to enclose the ovules. A pistil may be composed of a single carpel or of several carpels fused together.
(n) :
(botany) A constituent part of a flower pistil: the female reproductive organs in a flower. A carpel is composed of an ovary, a style, and a stigma, although some flowers have carpels without a distinct style. In origin, carpels are leaves (megasporophylls) that have evolved to enclose the ovules. A pistil may be composed of a single carpel or of several carpels fused together.