Neanderthal man vs Homo sapiens neanderthalensis

Neanderthal man and Homo sapiens neanderthalensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
Neanderthal man	Yes	No	No	No
Homo sapiens neanderthalensis	Yes	No	No	No

As nouns, Neanderthal man and Homo sapiens neanderthalensis are synonyms defined as:

Neanderthal man and Homo sapiens neanderthalensis: extinct robust human of Middle Paleolithic in Europe and western Asia

Other synonyms of Neanderthal man include Neandertal, Neandertal man, Neanderthal.

Neanderthal man (noun)	Homo sapiens neanderthalensis (noun)
extinct robust human of Middle Paleolithic in Europe and western Asia	extinct robust human of Middle Paleolithic in Europe and western Asia