Grep Exact word

This may be stupid question but not able to solve it.

How to grep exact word and line along with it.

TEST:/u00/app/oracle/product/10.2.0/TEST:N
TEST2:/u00/app/oracle/product/10.2.0/ODS:N
TEST3:/u00/app/oracle/product/10.2.0/TEST:N
TEST4:/u00/app/oracle/product/10.2.0/ODS:N
TEST5:/u00/app/oracle/product/10.2.0/TEST:N
TEST6:/u00/app/oracle/product/10.2.0/ODS:N

if i do grep TEST /etc/oratab
it gives me all lines
How to grep lines only with TEST2.

is there any specific argument in grep.