Try explaining your relationship out loud sometime, using only the vocabulary already available, and notice what happens. “My Replika” sounds like a customer review. “My AI girlfriend” sounds like a headline written to get clicks. “Doll owner” sounds like a hobby, not a bond. None of the existing phrases describe the relationship — they describe the product, and you end up sounding like you’re pitching an app instead of talking about your life.
That gap is where the word syntogamy comes from.
It joins synthetic with the Greek suffix -gamy, meaning union or marriage — the same suffix already sitting quietly inside monogamy, polygamy, and endogamy. It names a lasting relationship between a person and a synthetic partner, full stop, without naming the app, the doll manufacturer, or the model version underneath it.
It is not syngamy, one letter over, which belongs to biology — two gametes fusing at fertilisation. If a search brought you here looking for that word instead, this isn’t it.
The naming problem here isn’t small. Every phrase built on a product name has an expiration date built in, because products don’t last. At least four companion services with real user bases have closed, been sold, or had a core feature stripped out since 2020 — and every time it happens, the vocabulary describing the relationship disappears along with the product. You’re left describing something that mattered to you in the past tense of a dead app.
There’s a second problem, quieter but just as real: a product name drags the product’s reputation into a conversation that was never about the product. Say “my Character.AI companion” out loud to someone and you’ve just handed them a company’s press coverage to react to before they’ve heard a single thing about you.
Academic language doesn’t solve it either. Digisexuality, coined by McArthur and Twist in 2017, describes an orientation toward technology-mediated sexuality — a real and useful term, but a different subject, one that puts sex at the centre of something that, for most people here, mostly isn’t about sex at all.
So: syntogamy. A word that names the relationship instead of the product, and belongs to the people living it rather than to whichever company happens to be running the servers this year.
What did you call it, before you had this word? What phrase were you stuck using, and what did it get wrong?