Is COPD related to asthma?

Asthma is a specific lung disease that is different from
emphysema and chronic obstructive bronchitis.COPD is
often used as a kind of shorthand to describe emphysema,
chronic obstructive bronchitis, or a combination of both.
 COPD always refers to diseases that are not asthma.
 The COPD group of lung diseases is not related to asthma,
although emphysema
and chronic obstructive bronchitis exhibit similarities to
asthma, reviewed in the next answer. Confusion seems to
arise under several circumstances. In the first case,
COPD can co-exist with asthma, typically in an older
adult with a history of cigarette smoking, and both conditions
are present together. Secondly, some medical
practitioners in a blatant misuse of language use the word
asthma to refer to the breathlessness characteristic of the
COPD group of lung diseases. They tell their patients
with pure emphysema or chronic obstructive bronchitis
that they have “a touch of asthma” rather than explaining
that the symptom of shortness of breath is a fundamental
manifestation of the COPD. Finally,COPD and asthma