ochre vs sinopia

ochre and sinopia both are nouns.

Word	Noun	Adjective	Verb	Adverb
ochre	Yes	Yes	No	No
sinopia	Yes	No	No	No

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

ochre: any of various earths containing silica and alumina and ferric oxide; used as a pigment
sinopia: a red ocher formerly used as a pigment

Other hyponyms of ochre include sinoper, sinopis, yellow ocher, yellow ochre.

ochre (noun)	sinopia (noun)
a moderate yellow-orange to orange color	a red ocher formerly used as a pigment
any of various earths containing silica and alumina and ferric oxide; used as a pigment

ochre (adjective)	sinopia (adjective)
of a moderate orange-yellow color