What's the difference between norse and northman?

Norse

Definition:

(a.) Of or pertaining to ancient Scandinavia, or to the language spoken by its inhabitants.
(n.) The Norse language.

Example Sentences:

(1) Three hundred and forty-eight cranial remains from Bronze and Iron Age British, Romano-British, Anglo-Saxon, Eastern Coast Australian aborigines, Medieval Christian Norse, Medieval Scarborough, 17--20th century British and German cultures, were examined for the presence of osteoarthritis in the temporomandibular joints.
(2) It's hard to imagine a more masculine character than Thor, who is based on the god of thunder of Norse myth: he's the strapping, hammer-wielding son of Odin who, more often than not, sports a beard and likes nothing better than smacking frost giants.
(3) His favourite book is The Poetic Edda, a landmark collection of Old Norse poetry.
(4) (2) The Knowledge inbox overflowed with various further Sportings and Football Clubs from around this wide footballing world of ours and a few examples that highlight the difficulty of classifying exactly what constitutes 'non-native' (should Hibernian, derived from the Roman name for Ireland, count for example, or 'Rovers, which is apparently derived from Norse?).
(5) Whole settlements, complete with livestock could have retreated to these brochs at times of Norse attacks from the sea.
(6) In Norse mythology, Yggdrasil was an enormous ash tree that harboured all the life in the universe.
(7) Cloud and hosting services of industry giants like Amazon and GoDaddy are being used to launch the attacks, Norse’s research indicates.
(8) Byatt was speaking at the launch of her new book, a retelling of the Norse Ragnarok myth, in which, after a succession of natural disasters, the world ends: a story she has found compelling since her childhood during the war.
(9) Security consultants the Guardian contacted on Norse’s claims aren’t entirely sure there is enough proof of Iranian involvement.
(10) It marked the end of the Norse rule in Scotland – and the victory is commemorated each year at the Largs Viking Festival.
(11) But Norse believes it has enough evidence to substantiate its claims, which it will soon detail in full.
(12) In its own research, Norse set up fake systems that appeared to belong to businesses and critical infrastructure providers that would have proven attractive to attackers.
(13) The author Joanne Harris, whose new novel The Gospel of Loki is set in the world of Norse mythology, also called Nordby's discovery "very, very interesting".
(14) Kinship is largely due to local drift rather than Norse admixture, the estimate of which is obscured by drift and appears highly unreliable.
(15) ‘The groups are allowed to operate on financial crimes...’ Rather than large, singular groups of digital spies, Iran has quietly built up a secret, disparate army of “mercenaries”, each separate from one another but with similar aims, according to the authors of the report, which will be published soon by Silicon Valley security company Norse.
(16) Icebreaker: A Viking Voyage (£1.49 + IAP) Icebreaker is a puzzle-action game with a viking theme, tasking you with freeing Norse warriors by solving 140 physics-puzzle levels.
(17) Loosely based on the legendary saga of the Norse hero Ragnar Lothbrok , Vikings has moments of surprising historical clarity mixed up with a lot of HBO-style sex, mainly between Lothbrok and his wife Lagertha.
(18) "Banks don't cure disease", declared one gentle placard; "Science is more useful than duck islands" and "Ancient Norse is not a luxury," said others.
(19) To assess the temporal and spatial variation of one form of oral tori, palatine torus, observations were made on all available Greenlandic Norse skeletons, as well as on samples of medieval Icelanders and Norwegians.
(20) The figure for Alan Taylor's film, which once again stars Chris Hemsworth as the Norse god of thunder, suggests the movie is well on the way to a global debut of at least $200m when it debuts in North America and China next weekend.