slumberous vs slumbery

slumberous and slumbery both are adjectives.

Word	Noun	Adjective	Verb	Adverb
slumberous	No	Yes	No	No
slumbery	No	Yes	No	No

As adjectives, slumberous and slumbery are synonyms defined as:

Other synonyms of slumberous include slumbrous, somnolent.

slumberous (adjective)	slumbery (adjective)
inclined to or marked by drowsiness	inclined to or marked by drowsiness
quiet and tranquil