rice vs paddy

rice and paddy both are nouns.

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

As nouns, paddy is a hyponym of rice; that is, paddy is a word with a more specific, narrower meaning than rice:

Other hyponyms of rice include brown rice, polished rice, white rice.

rice (noun)	paddy (noun)
grains used as food either unpolished or more often polished	rice in the husk either gathered or still in the field
annual or perennial rhizomatous marsh grasses; seed used for food; straw used for paper	an irrigated or flooded field where rice is grown

rice (verb)	paddy (verb)
sieve so that it becomes the consistency of rice