stagnant vs moribund

stagnant and moribund both are adjectives.

Word	Noun	Adjective	Verb	Adverb
stagnant	No	Yes	No	No
moribund	No	Yes	No	No

As adjectives, stagnant and moribund are synonyms defined as:

stagnant and moribund: not growing or changing; without force or vitality

stagnant (adjective)	moribund (adjective)
not circulating or flowing	being on the point of death; breathing your last
not growing or changing; without force or vitality	not growing or changing; without force or vitality