"Chalange" is an incorrect spelling of the word "challenge." As a noun, "challenge" refers to a task or situation that tests one's abilities, skills, or resources. As a verb, "challenge" means to invite someone to engage in a competition or contest.

"Savere" is an incorrect spelling of the word "severe." "Severe" is an adjective used to describe something that is extremely intense, serious, or harsh in nature.

"Describtion" is an incorrect spelling of the word "description." "Description" is a noun referring to a spoken or written representation or account of a person, object, or event, typically providing details or characteristics.

"Infectuous" is an incorrect spelling of the word "infectious." "Infectious" is an adjective that describes something capable of spreading or transmitting a disease, emotion, or influence.

"Conserned" is an incorrect spelling of the word "concerned." "Concerned" is an adjective that describes someone who is worried, troubled, or interested in something.

"Localy" is an incorrect spelling of the word "locally." "Locally" is an adverb that pertains to a specific area or locality, indicating that something happens or exists within a particular region or community.

"Pennyless" is an incorrect spelling of the word "penniless." "Penniless" is an adjective used to describe someone who has no money or financial resources.

Preventive and preventative are two variations of the same word, and relate to actions taken to prevent undesirable from happening.

Mad and angry are both emotions indicating displeasure or irritation. "Mad" typically implies a more intense or irrational feeling of annoyance, while "angry" suggests a strong feeling of displeasure or hostility towards someone or something.