unequal vs inadequate

unequal and inadequate both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unequal	No	Yes	No	No
inadequate	No	Yes	No	No

As adjectives, unequal and inadequate are synonyms defined as:

unequal and inadequate: lacking the requisite qualities or resources to meet a task

unequal (adjective)	inadequate (adjective)
poorly balanced or matched in quantity or value or measure	lacking the requisite qualities or resources to meet a task
lacking the requisite qualities or resources to meet a task	of insufficient quantity to meet a need