The difference between Aroma and Reek

When used as nouns, aroma means a smell, whereas reek means a strong unpleasant smell.

Reek is also verb with the meaning: to have or give off a strong, unpleasant smell.

check bellow for the other definitions of Aroma and Reek

Aroma as a noun:

A smell; especially a pleasant spicy or fragrant one.

Examples:

"I love the aroma of [[cinnamon]]."

Reek as a verb (intransitive):

To have or give off a strong, unpleasant smell.

Examples:

"You reek of perfume."

"Your fridge reeks of egg."
Reek as a verb (intransitive, figuratively):

To be evidently associated with something unpleasant.

Examples:

"The boss appointing his nephew as a director reeks of nepotism."
Reek as a verb (archaic, intransitive):

To be emitted or exhaled, emanate, as of vapour or perfume.
Reek as a verb (archaic, intransitive):

To emit smoke or vapour; to steam.