Technacy is not a widely known term, as it seems to be a colloquialism, but there are a few words that could be used interchangeably with it. One term that may be similar in meaning is "technophilia," which means a love or passion for technology. "Technological adeptness" could also be used to describe someone who is proficient in technology. "Digital literacy" is another term that describes the ability to use and understand technology. "Tech-savvy" is a more informal term that means someone who is knowledgeable and skilled in the use of technology. Overall, there are several synonyms for technacy that represent a proficiency and love of technology.