The word and non-words below follow a certain pattern. Can you determine what it is?

DRIN
STID
DORD
ODOR

Answer:

Each word and non-word is made up of two common, two-letter abbreviations mushed together:

DRIN - Doctor and Inches
STID - Street and Identification
DORD - Doctor of Osteopathy and Road
ODOR - Doctor of Optometry and Operating Room