"Pain" is is an unpleasant sensation that is caused by injury or illness. Pain may also refer to suffering due to mental or emotional distress. "pane" is a sheet of glass in a window or in a door. Pane may also refer to panel in a window or door.

Practice does not make perfect. Only perfect practice makes perfect.

Some people mistake the words as having opposite meanings. In reality, flammable and inflammable mean exactly the same thing—capable of burning.

The word “send” is the present perfect tense of the verb while the word “sent” is the past tense and past participle tense of the verb. Both have progressive forms with the word “send” being used in its present form and the word “sent” in its past form.