streamlined vs sleek

streamlined and sleek both are adjectives.

Word	Noun	Adjective	Verb	Adverb
streamlined	No	Yes	No	No
sleek	No	Yes	Yes	No

As adjectives, streamlined and sleek are synonyms defined as:

streamlined and sleek: designed or arranged to offer the least resistance to fluid flow

Other synonyms of streamlined include aerodynamic, flowing.

streamlined (adjective)	sleek (adjective)
made efficient by stripping off nonessentials	having a smooth, gleaming surface reflecting light; being of a smooth, soft and lustrous quality, resembling silk
designed or arranged to offer the least resistance to fluid flow	well-groomed and neatly tailored; especially too well-groomed
	designed or arranged to offer the least resistance to fluid flow

streamlined (verb)	sleek (verb)
	make slick or smooth