membrane-forming vs membranous

membrane-forming and membranous both are adjectives.

Word	Noun	Adjective	Verb	Adverb
membrane-forming	No	Yes	No	No
membranous	No	Yes	No	No

As adjectives, membrane-forming and membranous are synonyms defined as:

membrane-forming and membranous: characterized by formation of a membrane (or something resembling a membrane)

membrane-forming (adjective)	membranous (adjective)
characterized by formation of a membrane (or something resembling a membrane)	relating to or made of or similar to a membrane
	characterized by formation of a membrane (or something resembling a membrane)