slenderize vs slim

slenderize is not an adjective while slim is an adjective.

Word	Noun	Adjective	Verb	Adverb
slenderize	No	No	Yes	No
slim	No	Yes	Yes	No

As verbs, slenderize and slim are synonyms defined as:

Other synonyms of slenderize include melt off, reduce, slim down, thin.

slenderize (adjective)	slim (adjective)
	small in quantity
	being of delicate or slender build

slenderize (verb)	slim (verb)
take off weight	take off weight
make slender or appear to be slender