(n.) Plural of Boundary.

O ambit annular muscle annulus areola aureole border boundaries boundary bounds bourns chaplet circle circuit circumscription circus closed circle compass confines coordinates corona coronet cortex covering crown crust cycle diadem discus disk edges envelope epidermis eternal return exterior external facade face facet fairy ring fringe fringes front garland glory halo integument lasso limitations limits lineaments logical circle loop looplet magic circle marches margin metes metes and bounds noose orbit outer face outer layer outer side outer skin outline outlines outside outskirts pale parameters perimeter periphery radius rim rind ring rondelle round roundel saucer shell skin skirts sphincter superficies superstratum surface top verges vicious circle wheel wreath