room vs lebensraum

room and lebensraum both are nouns.

Word	Noun	Adjective	Verb	Adverb
room	Yes	No	Yes	No
lebensraum	Yes	No	No	No

As nouns, lebensraum is a hyponym of room; that is, lebensraum is a word with a more specific, narrower meaning than room:

room: space for movement
lebensraum: space sought for occupation by a nation whose population is expanding

room (noun)	lebensraum (noun)
an area within a building enclosed by walls and floor and ceiling	space sought for occupation by a nation whose population is expanding
the people who are present in a room
space for movement
opportunity for

room (verb)	lebensraum (verb)
live and take one's meals at or in