The term "nethead" refers to someone who is addicted to the internet and spends most of their time online. However, there are various other synonyms that can be used to describe a nethead. One such term is "cyberholic" which refers to a person who is hooked on the internet and cannot go without it. Another synonym for nethead is "digital native" which describes someone who was born into the digital era and is highly skilled in using technology. "Web addict" is also a suitable synonym for nethead as it portrays a person who is excessively reliant on the internet. In short, these words can be used interchangeably to describe someone who is addicted to the internet.