candlenut vs oil-rich seed

candlenut and oil-rich seed both are nouns.

Word	Noun	Adjective	Verb	Adverb
candlenut	Yes	No	No	No
oil-rich seed	Yes	No	No	No

As nouns, oil-rich seed is a hypernym of candlenut; that is, oil-rich seed is a word with a broader meaning than candlenut:

Other hypernyms of candlenut include oilseed.

candlenut (noun)	oil-rich seed (noun)
large tree native to southeastern Asia; the nuts yield oil used in varnishes; nut kernels strung together are used locally as candles	any of several seeds that yield oil
seed of candlenut tree; source of oil used in varnishes