wheat berry vs bulghur

wheat berry and bulghur both are nouns.

Word	Noun	Adjective	Verb	Adverb
wheat berry	Yes	No	No	No
bulghur	Yes	No	No	No

As nouns, bulghur is a hyponym of wheat berry; that is, bulghur is a word with a more specific, narrower meaning than wheat berry:

wheat berry: grains of common wheat; sometimes cooked whole or cracked as cereal; usually ground into flour
bulghur: parched crushed wheat

Other hyponyms of wheat berry include bulgur, bulgur wheat, cracked wheat.

wheat berry (noun)	bulghur (noun)
grains of common wheat; sometimes cooked whole or cracked as cereal; usually ground into flour	parched crushed wheat
a grain of wheat