Interesting one. here's mine...
SOX - socks
SON - pronounced as seen (I don't say "sun").
Cosmopolis - CozMOP-olis (best describes the emphasis in the first part of the word).
GEC - gee eee cee
Iridium - Iriddyum (although I also have a habit of saying things like "nasty tat" instead of Iridium
)
Halide - hay-lied or 'eh-lied depending on how I formed the sentence
Eleco - ee-lee-co
Halogen - for some reason I pronounce this hey-lujen, although I suspect it's not common...
CU Phosco - See You Foss-co (but sometimes I say "cue Foss-co" as well)
now here's an odd one... I've taken to pronouncing WRTL "wur-tal"... yes really
Can't think of any others, although I say incandescent weirdly as well, "in-CAN-descent".