suffix
prefix
use instead
100

-ist

one who specilizes

100

a-

no not without

100

instead of "u"

write "unit"
200

-logy

study of

200

endo-

within

200

instead of "@"

use "at"

300

-itis

inflammation

300

neo-

new

300

instead of "cc"

use "mL" 

400

-ectomy

removal, excision

400

para-

near, beside, abnornal

400

instead of apothecary units

use "Metric Units"

500

-stenosis

narrowing 

Easily confused with -sclerosis which means hardening

500

pseudo-

fake

500

Instead of "Q.D" or "q.O.D"

write out "use daily" or "use every other day"