"long-term friend" is a grammatically correct phrase that can be used in written English.
For example: "Theresa has been my long-term friend for over 20 years."
Esiri is a long-term friend of the Cameron family.
Even with a long-term friend or lover?
Keenan reasserted Australia's status as a "long-term friend" of the US in the Pacific region.
Symons, a long-term friend of both Jowell and Mills, agreed to help.
"Dan is a long-term friend and adviser of Mitt," said Beth Myers, one of Mr. Romney's top strategists.
Wilder's long-term friend Carl Reiner bid him goodbye and offered a low-key endorsement of the star's work.
Faulks was a columnist for the Guardian and Walsh and McKay are long-term friends.
On Sunday, two incredibly wealthy long-term friends had a violent altercation on a Bondi footpath.
Rihanna, Beyoncé and Katy Perry are long-term friends and fans.
With long-term friends, make sure the communication is deeper and more detailed.
The gag gift is a stubborn holiday tradition in many families and small circles of long-term friends.
