contemptuously vs disdainfully

contemptuously and disdainfully both are adverbs.

Word	Noun	Adjective	Verb	Adverb
contemptuously	No	No	No	Yes
disdainfully	No	No	No	Yes

As adverbs, contemptuously and disdainfully are synonyms defined as:

contemptuously and disdainfully: without respect; in a disdainful manner

Other synonyms of contemptuously include contumeliously, scornfully.

contemptuously (adverb)	disdainfully (adverb)
without respect; in a disdainful manner	without respect; in a disdainful manner
	in a proud and domineering manner