The difference between Ugly and Unattractive

When used as nouns, ugly means ugliness, whereas unattractive means an aesthetically unattractive person.

When used as adjectives, ugly means displeasing to the eye, whereas unattractive means not handsome or beautiful or appealing.

Ugly is also verb with the meaning: to make ugly (sometimes with up).

check bellow for the other definitions of Ugly and Unattractive

Ugly as an adjective:

Displeasing to the eye; not aesthetically pleasing.
Ugly as an adjective:

Displeasing to the ear or some other sense.
Ugly as an adjective:

Offensive to one's sensibilities or morality.

Examples:

"He played an ugly trick on us."
Ugly as an adjective:

Ill-natured; crossgrained; quarrelsome.

Examples:

"an ugly temper; to feel ugly'"
Ugly as an adjective:

Unpleasant; disagreeable; likely to cause trouble or loss.

Examples:

"an ugly rumour; an ugly customer; an ugly wound"

"With all this competition, expect things to get ugly."

Ugly as a noun (slang, uncountable):

Ugliness.
Ugly as a noun (slang):

An ugly person or thing.
Ugly as a noun (UK, informal, dated):

A shade for the face, projecting from a bonnet.

Examples:

"rfquotek Charles Kingsley"

Ugly as a verb (transitive, nonstandard):

To make ugly (sometimes with up).