WordNet records no synonym and no antonym for devices. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
an inclination or desire; used in the plural in the phrase `left to your own devices'
“eventually the family left the house to the devices of this malevolent force”
Synonyms, antonyms and the broader and narrower relations for devices come from Princeton University’s WordNet. Full sources and licences.