Ache
Definition 1 of 4
Pro Tip 1/3
Body Part Specific
Ache often refers to pain in a specific part of the body rather than general pain. She had an intense headache.
Pro Tip 2/3
Persistent Pain
'Ache' implies a lasting pain, less severe than sharp or sudden pain. His toothache wouldn't go away.
Pro Tip 3/3
Less Intense
Ache is less intense than agony or torment but can be constant. The dull ache in her shoulder persisted.