We don't have synonyms for mitres yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are mitre, mites and litres.
(n) :
A covering for the head, worn on solemn occasions by church dignitaries, which has been made in many forms, mostly recently a tall cap with two points or peaks.
(n) :
The surface forming the bevelled end or edge of a piece where a miter joint is made; also, a joint formed or a junction effected by two beveled ends or edges; a miter joint.
(n) :
A cap or cowl for a chimney or ventilation pipe.
(n) :
A covering for the head, worn on solemn occasions by church dignitaries, which has been made in many forms, mostly recently a tall cap with two points or peaks.
(n) :
The surface forming the bevelled end or edge of a piece where a miter joint is made; also, a joint formed or a junction effected by two beveled ends or edges; a miter joint.
(n) :
A cap or cowl for a chimney or ventilation pipe.