An " fragrant aroma" or a "perfume".
The word "aroma" is usually used to describe a pleasant smell.
Esters give many flowers their pleasant odor.
Pleasant
pleasant
loving and caring
friendly, amiable, pleasant...
odor/odourscentaromafragrance
The word good is an adjective. It is another word for pleasant or enjoyable.
Odor denotes a bad smell and aroma denotes a pleasant one.
Odor
pleasant
In the word pleasant we will add un and the answer will be unpleasant