achene vs samara

achene and samara both are nouns.

Word	Noun	Adjective	Verb	Adverb
achene	Yes	No	No	No
samara	Yes	No	No	No

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

achene: small dry indehiscent fruit with the seed distinct from the fruit wall
samara: a winged often one-seed indehiscent fruit as of the ash or elm or maple

Other hyponyms of achene include key, key fruit.

achene (noun)	samara (noun)
small dry indehiscent fruit with the seed distinct from the fruit wall	a winged often one-seed indehiscent fruit as of the ash or elm or maple