plastid vs chromoplast

plastid and chromoplast both are nouns.

Word	Noun	Adjective	Verb	Adverb
plastid	Yes	No	No	No
chromoplast	Yes	No	No	No

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

plastid: any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein
chromoplast: plastid containing pigments other than chlorophyll usually yellow or orange carotenoids

Other hyponyms of plastid include chloroplast.

plastid (noun)	chromoplast (noun)
any of various small particles in the cytoplasm of the cells of plants and some animals containing pigments or starch or oil or protein	plastid containing pigments other than chlorophyll usually yellow or orange carotenoids