whitewash

nouns

a defeat in which the losing person or team fails to score
is a type of (narrower)
an unsuccessful ending to a struggle or contest
"it was a narrow defeat"; "the army's only defeat"; "they suffered a convincing licking"
wash consisting of lime and size in water; used for whitening walls and other surfaces
is a type of (narrower)
a thin coat of water-base paint
a specious or deceptive clearing that attempts to gloss over failings and defects
is a type of (narrower)
the act of freeing from suspicion

verbs

cover up a misdemeanor, fault, or error
"Let's not whitewash the crimes of Stalin"; "She tried to gloss over her mistakes"
cover with whitewash
"whitewash walls"
is a type of (narrower)
apply a thin coating of paint, metal, etc., to
exonerate by means of a perfunctory investigation or through biased presentation of data
is a type of (narrower)
pronounce not guilty of criminal charges
"The suspect was cleared of the murder charges"