I had the same thought.

Some of the surprising discoveries I made with word2vec embeddings:

human + robot ~= cyborg

silicon + electricity ~= solar cells

virtual reality + reality ~= augmented reality

As reported here: https://web.archive.org/web/20160806040004if_/http://blog.yh...

how do you get human and robot?

More dimensions?

The open vocabulary aspect seems important. Word2vec would never let me make "Pirate Pope Wars".

I have made a similar thing a few months back, word2vec is inferior because it can't really do compound words, it sometimes returns unintuitive results, and then also you can't prompt it.

I thought this would be very simple to do, so I tried it. https://silphendio.github.io/word2vec_alchemy/

That simple demo took me way too long and all that time is wasted because word2vec simply sucks for this use-case.