Triangulum Australe vs Southern Triangle

Triangulum Australe and Southern Triangle both are nouns.

Word	Noun	Adjective	Verb	Adverb
Triangulum Australe	Yes	No	No	No
Southern Triangle	Yes	No	No	No

As nouns, Triangulum Australe and Southern Triangle are synonyms defined as:

Triangulum Australe and Southern Triangle: a small bright constellation in the polar region of the Southern Hemisphere near Circinus and Apus

Triangulum Australe (noun)	Southern Triangle (noun)
a small bright constellation in the polar region of the Southern Hemisphere near Circinus and Apus	a small bright constellation in the polar region of the Southern Hemisphere near Circinus and Apus