shed vs caducous

shed is a noun but caducous is not a noun.

Word	Noun	Adjective	Verb	Adverb
shed	Yes	Yes	Yes	No
caducous	No	Yes	No	No

As adjectives, shed and caducous are synonyms defined as:

shed (noun)	caducous (noun)
an outbuilding with a single story; used for shelter or storage

shed (adjective)	caducous (adjective)
shed at an early stage of development	shed at an early stage of development

shed (verb)	caducous (verb)
cast off hair, skin, horn, or feathers
cause or allow (a solid substance) to flow or run out or over
to remove
pour out in drops or small quantities or as if in drops or small quantities