defenselessly vs defenseless

defenselessly is not an adjective while defenseless is an adjective.

Word	Noun	Adjective	Verb	Adverb
defenselessly	No	No	No	Yes
defenseless	No	Yes	No	Yes

As adverbs, defenselessly and defenseless are synonyms defined as:

Other synonyms of defenselessly include defenceless, defencelessly.

defenselessly (adjective)	defenseless (adjective)
	lacking weapons for self-defense
	having no protecting or concealing cover
	lacking protection or support

defenselessly (adverb)	defenseless (adverb)
without defense	without defense