heartache

As nouns the difference between taxonomy and heartache

is that taxonomy is the science or the technique used to make a classification while heartache is very sincere and difficult emotional problems or stress.

As nouns the difference between heartbreaking and heartache

is that heartbreaking is the breaking of a heart; great grief, anguish or distress while heartache is very sincere and difficult emotional problems or stress.

As an adjective heartbreaking

is that causes great grief, anguish or distress.

As nouns the difference between heartache and distress

is that heartache is very sincere and difficult emotional problems or stress while distress is (Cause of) discomfort.

As a verb distress is

to cause strain or anxiety to someone.

As nouns the difference between heartache and heartgrief

is that heartache is very sincere and difficult emotional problems or stress while heartgrief is heartache; sorrow.

As a noun heartache

is very sincere and difficult emotional problems or stress.

As an adjective heartachy is

causing, or afflicted with, heartache.