slight vs svelte

slight is a noun but svelte is not a noun.

Word	Noun	Adjective	Verb	Adverb
slight	Yes	Yes	Yes	No
svelte	No	Yes	No	No

As adjectives, slight and svelte are synonyms defined as:

Other synonyms of slight include slender, slim.

slight (noun)	svelte (noun)
a deliberate discourteous act (usually as an expression of anger or disapproval)

slight (adjective)	svelte (adjective)
(quantifier used with mass nouns) small in quantity or degree; not much or almost none or (with `a') at least some	being of delicate or slender build
lacking substance or significance
being of delicate or slender build

slight (verb)	svelte (verb)
pay no attention to, disrespect