wheat berry vs bulgur

wheat berry and bulgur both are nouns.

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

As nouns, bulgur is a hyponym of wheat berry; that is, bulgur 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
bulgur: parched crushed wheat

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

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