The difference between Coronal and Retroflex

Coronal as a noun:

A crown or coronet.

Coronal as a noun:

A wreath or garland of flowers.

Coronal as a noun (obsolete):

A variant of colonel.

Coronal as a noun:

The frontal bone, over which the ancients wore their coronae or garlands.

Coronal as a noun (phonetics):

A consonant produced with the tip or blade of the tongue.

Coronal as an adjective:

relating to a crown or coronation

Coronal as an adjective (astronomy):

relating to the corona of a star

Coronal as an adjective (botany):

relating to the corona of a flower

Coronal as an adjective (phonetics):

relating to a sound made with the tip or blade of the tongue

Coronal as an adjective (anatomy):

Relating to the coronal plane that divides a body into dorsal (back) and ventral (front)

Retroflex as an adjective:

Bent or curved backwards.

Retroflex as an adjective (phonetics):

Of pronunciation in which the tip of the tongue is raised and bent backwards, so that the underside of the tongue approaches or touches the palate.

Retroflex as an adjective (phonetics):

Of pronunciation in which the tip of the tongue approaches or touches the back of the alveolar ridge.

Retroflex as an adjective (phonetics):

Of pronunciation in which the blade of the tongue approaches or touches the back of the alveolar ridge.

Retroflex as an adjective (phonetics, general sense):

Of any of the aforementioned pronunciations.

Retroflex as a noun (phonetics):

A consonant pronounced with the underside of the tongue approaching or touching the palate.

Retroflex as a noun (phonetics):

A consonant pronounced with the tip of the tongue approaching or touching the back of the alveolar ridge.

Retroflex as a noun (phonetics):

A consonant pronounced with the blade of the tongue approaching or touching the back of the alveolar ridge.

Retroflex as a noun (phonetics, general sense):

Any of the aforementioned consonants.