Haganah vs military group

Haganah and military group both are nouns.

Word	Noun	Adjective	Verb	Adverb
Haganah	Yes	No	No	No
military group	Yes	No	No	No

As nouns, military group is a hypernym of Haganah; that is, military group is a word with a broader meaning than Haganah:

Haganah: the clandestine military wing of the Jewish leadership during the British rule over the mandate of Palestine from 1920 to 1948; became the basis for the Israeli defense force
military group: a unit that is part of some military service

Other hypernyms of Haganah include force, military force, military unit.

Haganah (noun)	military group (noun)
the clandestine military wing of the Jewish leadership during the British rule over the mandate of Palestine from 1920 to 1948; became the basis for the Israeli defense force	a unit that is part of some military service