abase vs humble

abase is not an adjective while humble is an adjective.

Word	Noun	Adjective	Verb	Adverb
abase	No	No	Yes	No
humble	No	Yes	Yes	No

As verbs, abase and humble are synonyms defined as:

Other synonyms of abase include chagrin, humiliate, mortify.

abase (adjective)	humble (adjective)
	marked by meekness or modesty; not arrogant or prideful
	low or inferior in station or quality
	of low birth or station (`base' is archaic in this sense)
	used of unskilled work (especially domestic work)

abase (verb)	humble (verb)
cause to feel shame; hurt the pride of	cause to feel shame; hurt the pride of
	cause to be unpretentious