intima vs membrane

intima and membrane both are nouns.

Word	Noun	Adjective	Verb	Adverb
intima	Yes	No	No	No
membrane	Yes	No	No	No

As nouns, membrane is a hypernym of intima; that is, membrane is a word with a broader meaning than intima:

intima: the innermost membrane of an organ (especially the inner lining of an artery or vein or lymphatic vessel)
membrane: a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants

Other hypernyms of intima include tissue layer.

intima (noun)	membrane (noun)
the innermost membrane of an organ (especially the inner lining of an artery or vein or lymphatic vessel)	a thin pliable sheet of material
	a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants