military unit vs military force

military unit and military force both are nouns.

Word	Noun	Adjective	Verb	Adverb
military unit	Yes	No	No	No
military force	Yes	No	No	No

As nouns, military unit and military force are synonyms defined as:

military unit and military force: a unit that is part of some military service

Other synonyms of military unit include force, military group.

military unit (noun)	military force (noun)
a unit that is part of some military service	a unit that is part of some military service