The difference between Sicker and Sure

When used as adverbs, sicker means certainly, whereas sure means without doubt, certainly.

When used as adjectives, sicker means the , whereas sure means physically secure and certain, non-failing, reliable.

Sicker is also verb with the meaning: to percolate, trickle, or ooze, as water through a crack.

Sure is also interjection with the meaning: yes.

check bellow for the other definitions of Sicker and Sure

Sicker as an adjective (obsolete, outside, dialects):

Certain.

Examples:

"I'm sicker that he's not home."
Sicker as an adjective (obsolete, outside, dialects):

Secure, safe.

Examples:

"To walk a sicker path"

Sicker as a verb (mining, UK, dialect):

To percolate, trickle, or ooze, as water through a crack.

Sure as an adjective:

Physically secure and certain, non-failing, reliable.

Examples:

"This investment is a sure thing. The bailiff had a sure grip on the prisoner's arm."
Sure as an adjective:

Certain in one's knowledge or belief.

Examples:

"He was sure she was lying. I am sure of my eventual death. John was acting sure of himself but in truth had doubts."
Sure as an adjective:

Certain to act or be a specified way.

Examples:

"Be sure to lock the door when you leave."
Sure as an adjective (obsolete):

Free from danger; safe; secure.
Sure as an adjective (obsolete):

Betrothed; engaged to marry.

Sure as an adverb (modal adverb):

Without doubt, certainly.

Examples:

"Sure he's coming! Why wouldn't he?"

"Did you kill that bear yourself? ―"I sure did!"