star fruit vs carambola

star fruit and carambola both are nouns.

Word	Noun	Adjective	Verb	Adverb
star fruit	Yes	No	No	No
carambola	Yes	No	No	No

As nouns, star fruit and carambola are synonyms defined as:

star fruit and carambola: deeply ridged yellow-brown tropical fruit; used raw as a vegetable or in salad or when fully ripe as a dessert

star fruit (noun)	carambola (noun)
deeply ridged yellow-brown tropical fruit; used raw as a vegetable or in salad or when fully ripe as a dessert	deeply ridged yellow-brown tropical fruit; used raw as a vegetable or in salad or when fully ripe as a dessert
	East Indian tree bearing deeply ridged yellow-brown fruit