respiratory

As a verb breathe

is to draw air into (inhale), and expel air from (exhale), the lungs in order to extract oxygen and excrete waste gases.

As an adjective respiratory is

relating to respiration; breathing.

As adjectives the difference between respiratory and competitive

is that respiratory is relating to respiration; breathing while competitive is .

As adjectives the difference between respiratory and fermentative

is that respiratory is relating to respiration; breathing while fermentative is of, pertaining to, causing or undergoing fermentation.

As adjectives the difference between respirational and respiratory

is that respirational is of or pertaining to respiration while respiratory is relating to respiration; breathing.

As adjectives the difference between respiratory and breathy

is that respiratory is relating to respiration; breathing while breathy is accompanied by audible breathing.

As adjectives the difference between respiratory and digestive

is that respiratory is relating to respiration; breathing while digestive is of, relating to, or functioning in digestion.

As a noun digestive is

a substance that aids digestion.

As adjectives the difference between excretory and respiratory

is that excretory is of, or relating to excretion while respiratory is relating to respiration; breathing.

As adjectives the difference between inspiratory and respiratory

is that inspiratory is of or pertaining to inspiration (in all senses) while respiratory is relating to respiration; breathing.

As adjectives the difference between pectoral and respiratory

is that pectoral is of or pertaining to the breast, or chest; as, the pectoral muscles while respiratory is relating to respiration; breathing.

As a noun pectoral

is protective armor for a horse's breast.

As adjectives the difference between cardiac and respiratory

is that cardiac is pertaining to the heart while respiratory is relating to respiration; breathing.

As a noun cardiac

is a person with heart disease.