intercellular substance vs ground substance

intercellular substance and ground substance both are nouns.

Word	Noun	Adjective	Verb	Adverb
intercellular substance	Yes	No	No	No
ground substance	Yes	No	No	No

As nouns, intercellular substance and ground substance are synonyms defined as:

intercellular substance and ground substance: the body substance in which tissue cells are embedded

Other synonyms of intercellular substance include matrix.

intercellular substance (noun)	ground substance (noun)
the body substance in which tissue cells are embedded	the body substance in which tissue cells are embedded
	the clear nongranular portion of the cytoplasm of a cell