Levi-Lorrain dwarf vs nanus

Levi-Lorrain dwarf and nanus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Levi-Lorrain dwarf	Yes	No	No	No
nanus	Yes	No	No	No

As nouns, nanus is a hypernym of Levi-Lorrain dwarf; that is, nanus is a word with a broader meaning than Levi-Lorrain dwarf:

Levi-Lorrain dwarf: a dwarf whose condition is caused by a deficiency of growth hormones, rather than by genetic factors (as in the case of the achondroplastic dwarf)
nanus: a person who is markedly small

Other hypernyms of Levi-Lorrain dwarf include dwarf, midget.

Levi-Lorrain dwarf (noun)	nanus (noun)
a dwarf whose condition is caused by a deficiency of growth hormones, rather than by genetic factors (as in the case of the achondroplastic dwarf)	a person who is markedly small