carambola vs star fruit

carambola and star fruit both are nouns.

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

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

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

carambola (noun)	star fruit (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