sleek over vs whitewash

sleek over is not a noun while whitewash is a noun.

Word	Noun	Adjective	Verb	Adverb
sleek over	No	No	Yes	No
whitewash	Yes	No	Yes	No

As verbs, sleek over and whitewash are synonyms defined as:

Other synonyms of sleek over include gloss over, hush up.

sleek over (noun)	whitewash (noun)
	a specious or deceptive clearing that attempts to gloss over failings and defects
	wash consisting of lime and size in water; used for whitening walls and other surfaces
	a defeat in which the losing person or team fails to score

sleek over (verb)	whitewash (verb)
cover up a misdemeanor, fault, or error	exonerate by means of a perfunctory investigation or through biased presentation of data
	cover with whitewash
	cover up a misdemeanor, fault, or error