mesoblast vs mesenchyme

mesoblast and mesenchyme both are nouns.

Word	Noun	Adjective	Verb	Adverb
mesoblast	Yes	No	No	No
mesenchyme	Yes	No	No	No

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

mesoblast: the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue
mesenchyme: mesodermal tissue that forms connective tissue and blood and smooth muscles

Other hyponyms of mesoblast include chordamesoderm, chordomesoderm.

mesoblast (noun)	mesenchyme (noun)
the middle germ layer that develops into muscle and bone and cartilage and blood and connective tissue	mesodermal tissue that forms connective tissue and blood and smooth muscles