pallidum vs basal ganglion

pallidum and basal ganglion both are nouns.

Word	Noun	Adjective	Verb	Adverb
pallidum	Yes	No	No	No
basal ganglion	Yes	No	No	No

As nouns, basal ganglion is a hypernym of pallidum; that is, basal ganglion is a word with a broader meaning than pallidum:

pallidum: the inner pale yellow part of the lenticular nucleus
basal ganglion: any of several masses of subcortical grey matter at the base of each cerebral hemisphere that seem to be involved in the regulation of voluntary movement

pallidum (noun)	basal ganglion (noun)
the inner pale yellow part of the lenticular nucleus	any of several masses of subcortical grey matter at the base of each cerebral hemisphere that seem to be involved in the regulation of voluntary movement