The coincidence I have noticed is when a word is spoken at the same time as I happen to be reading the word, or a similar word with the word within in it.
For example, a presenter on television might say the word "everything" as I am reading "every dog was hot" on a text message. Or, I overhear someone say the word 'pedigree" as I read it in a book.
It is now happening regularly enough I have noticed more, and it is not quite freaking me out, but I now want to know. Is this a thing?! Does anyone else have this or similar happen frequently?