Regexp is your friend.

Here is a list of words that can be used as substitutions in sed/ed/vi.
(For example sarsparilla will substitute "rsp" to "rill".)

Sahara,
sanatoria,
Sarasota,
Saratoga,
sarsparilla,
Saturnalia,
Savonarola,
secede,
secrete,
secretive,
seeable,
seepage,
seethe,
segregate,
selenate,
selenite,
sentence,
serenade,
serene,
serpentine,
serviceable,
serviette,
severe,
sewerage,
sticktight,
strategist,
synonymy,
syzygy

Very use full indeed.
(If you'r not a friend of vi and sed, just forget you saw this page, ok?)