Unkept and Unkempt

Unkept adjective - (especially of promises or contracts) having been violated or disregarded.

Unkempt and unkept are semantically related. In some cases you can use "Unkempt" instead an adjective "Unkept".

Unkempt adjective - Lacking in order, neatness, and often cleanliness.

Unkept and unkempt are semantically related. Sometimes you can replace term "Unkept" with "Unkempt", this adjectives are similar.