BLEND v.
To mix or mingle together; esp. to mingle, combine, or associate so that the separate things mixed, or the line of demarcation, can not be distinguished. Hence: To confuse; to confound. Blending the grand, the beautiful, the gay. Percival.
BOILER n.
A strong metallic vessel, usually of wrought iron plates riveted together, or a composite structure variously formed, in which steam is generated for driving engines, or for heating, cooking, or other purposes.