Thinking about the sounds letters make, I started to wonder if there are any letters of the alphabet which are *never* silent, or if the entire alphabet could be "said" by saying nothing at all....
I'm hardly the first person to try making an alphabet out of this online. I don't pronounce all the words the same as some of those who've tried this exercise, so am not convinced by those in brackets, although they're starting places. * mark words disagreed with by commenters.
C *chthonic, muscle
D *Wednesday, bridge
In short: the phonics alphabet *could* be largely pronounced through silence, with just a couple of letters left to say any other way....
Done with some insights from this site, this one and this one.