rice paddy vs paddy field

rice paddy and paddy field both are nouns.

Word	Noun	Adjective	Verb	Adverb
rice paddy	Yes	No	No	No
paddy field	Yes	No	No	No

As nouns, rice paddy and paddy field are synonyms defined as:

rice paddy and paddy field: an irrigated or flooded field where rice is grown

Other synonyms of rice paddy include paddy.

rice paddy (noun)	paddy field (noun)
an irrigated or flooded field where rice is grown	an irrigated or flooded field where rice is grown