Nanarchist: Someone who circumvents government control to use nanotechnology, or someone who advocates this.
Nanarchy: The use of automatic law-enforcement by nanomachines or robots, without any human control .
Nanite: Machines with atomic-scale components. (Popularized by the Star Trek episode "Evolution") As to their weight, a popular question: "Do you 'feel' heavier after you drink a mouthful of water? A mouthful of water, roughly 5 cm^3, would have the same mass as a ~2 terabot (2 trillion nanites) dose of 1 micron^3 nanorobots. You'll never feel it." Robert A. Freitas Jr. "Nanobot" and "Nanorobot" usually mean the same thing.

Nanoarray: an ultra-sensitve, ultra-miniaturized array for biomolecular analysis. BioForce Nanosciences' Nanoarrays utilize approximately 1/10,000th of the surface area occupied by a conventional microarray, and over 1,500 nanoarray spots can be placed in the area occupied by a single microarray domain. [BioForce Nanosciences]