Manual Transmission
by crank811
|STICK|
PARALLEL
SUBMARINE
/SHIFT/
SHIMMERING
RABBINICAL
BOOKWORM
RATIONALITY
|STICK|
GREGARIOUS
HEADSTRONG
IRIDESCENT
\SHIFT\
ANTITHETICAL
RAILROADED
THICKENING
DISPOSITION
MASSEUSE
DEHUMANIZE
|STICK|
POPULATED
SALTSHAKER
PARAMECIUM
GROUNDHOG
Your answer:

Don't worry about lower/upper case and whitespace. They don't matter.