Cheval :: Cheval (n.) A horse; hence, a support or frame..
Cheval-de-frise :: Cheval-de-frise (n.) A piece of timber or an iron barrel traversed with iron-pointed spikes or spears, five or six feet long, used to defend a passage, stop a breach, or impede the advance of cavalry, etc..
Chevalier :: Chevalier (n.) A horseman; a knight; a gallant young man.
Chevalier :: Chevalier (n.) A member of certain orders of knighthood.