The difference between Better and Worsen

When used as verbs, better means to improve, whereas worsen means to make worse.

Better is also noun with the meaning: an entity, usually animate, deemed superior to another.

check bellow for the other definitions of Better and Worsen

Better as an adverb:
Better as an adverb:

More, in reference to value, distance, time, etc.

Examples:

"ten miles and better"

Better as a noun:

An entity, usually animate, deemed superior to another; one who has a claim to precedence; a superior.

Examples:

"He quickly found Ali his better in the ring."

Better as a verb (transitive):

To improve.
Better as a verb (intransitive):

To become better; to improve.

Examples:

"rfquotek Carlyle"
Better as a verb (transitive):

To surpass in excellence; to exceed; to excel.
Better as a verb (transitive):

To give advantage to; to support; to advance the interest of.
Better as a verb (colloquial):

Had better.

Examples:

"You better do that if you know what's good for you."

Worsen as a verb (transitive):

To make worse; to impair.

Examples:

"The global warming has worsened the weather."
Worsen as a verb (intransitive):

To become worse; to get worse.

Examples:

"The weather has worsened."
Worsen as a verb (transitive, obsolete):

To get the better of; to worst.