We don't have synonyms for champain yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are champion, campaign and champaign.
(adj) :
Alternative form of champaine. [(heraldry) Curved (concave), enarched, or sometimes varriated; especially in the phrase point champaine, an abatement consisting of a curved (or sometimes horizontal) stain the bottom of the shield.]
(adj) :
Alternative form of champaine. [(heraldry) Curved (concave), enarched, or sometimes varriated; especially in the phrase point champaine, an abatement consisting of a curved (or sometimes horizontal) stain the bottom of the shield.]