gloss vs gloss over

gloss is a noun but gloss over is not a noun.

Word	Noun	Adjective	Verb	Adverb
gloss	Yes	No	Yes	No
gloss over	No	No	Yes	No

gloss (noun)	gloss over (noun)
the property of being smooth and shiny
an outward or token appearance or form that is deliberately misleading
an explanation or definition of an obscure word in a text
an alphabetical list of technical terms in some specialized field of knowledge; usually published as an appendix to a text on that field

gloss (verb)	gloss over (verb)
provide an interlinear translation of a word or phrase	cover up a misdemeanor, fault, or error
provide interlinear explanations for words or phrases	treat hurriedly or avoid dealing with properly
give a deceptive explanation or excuse for
give a shine or gloss to, usually by rubbing