translucent substance vs transparent substance

translucent substance and transparent substance both are nouns.

Word	Noun	Adjective	Verb	Adverb
translucent substance	Yes	No	No	No
transparent substance	Yes	No	No	No

As nouns, translucent substance and transparent substance are synonyms defined as:

translucent substance and transparent substance: a material having the property of admitting light diffusely; a partly transparent material

translucent substance (noun)	transparent substance (noun)
a material having the property of admitting light diffusely; a partly transparent material	a material having the property of admitting light diffusely; a partly transparent material