* Sweeten: This directly refers to making something sweeter, usually by adding sugar.
* Sugarcoat: This implies making something unpleasant sound more palatable.
* Charm: This refers to being appealing and attractive, often in a charming or delightful way.
* Savor: This implies enjoying something fully, often because it is sweet or pleasurable.
* Indulge: This refers to allowing oneself to enjoy something pleasurable, even if it's considered a little excessive.
You could also use "to have a sweet taste" or "to have a sweet flavor", but these are more descriptive phrases than verbs.
Ultimately, the best verb to use depends on the specific context of your sentence.