domatium vs plant part

domatium and plant part both are nouns.

Word	Noun	Adjective	Verb	Adverb
domatium	Yes	No	No	No
plant part	Yes	No	No	No

As nouns, plant part is a hypernym of domatium; that is, plant part is a word with a broader meaning than domatium:

domatium: a part of a plant (e.g., a leaf) that has been modified to provide protection for insects or mites or fungi
plant part: any part of a plant or fungus

Other hypernyms of domatium include plant structure.

domatium (noun)	plant part (noun)
a part of a plant (e.g., a leaf) that has been modified to provide protection for insects or mites or fungi	any part of a plant or fungus