Low and Long-faced

Low adjective - Being near the equator.

Long-faced and low are semantically related In some cases you can use "Long-faced" instead an adjective "Low".

Long-faced adjective - Having a face longer than the usual.

Low and long-faced are semantically related in depressed topic. Sometimes you can use "Low" instead an adjective phrase "Long-faced", if it concerns topics such as sad.