drooping vs nodding

drooping and nodding both are adjectives.

Word	Noun	Adjective	Verb	Adverb
drooping	No	Yes	No	No
nodding	No	Yes	No	No

As adjectives, drooping and nodding are synonyms defined as:

drooping and nodding: having branches or flower heads that bend downward

Other synonyms of drooping include cernuous, pendulous, weeping.

drooping (adjective)	nodding (adjective)
hanging down (as from exhaustion or weakness)	having branches or flower heads that bend downward
weak from exhaustion
having branches or flower heads that bend downward