The difference between Intensive and Proper

When used as adjectives, intensive means thorough, whereas proper means suited or acceptable to the purpose or circumstances.

Intensive is also noun with the meaning: form of a word with a stronger or more forceful sense than the root on which the intensive is built.

Proper is also adverb with the meaning: properly.

check bellow for the other definitions of Intensive and Proper

Intensive as an adjective:

Thorough; to a great degree; with intensity.
Intensive as an adjective:

Demanding; requiring a great amount of work etc.

Examples:

"This job is difficult because it is so labour-intensive."
Intensive as an adjective:

Highly concentrated.

Examples:

"I took a three-day intensive course in finance."
Intensive as an adjective (obsolete):

Stretched; allowing intension, or increase of degree; that can be intensified.

Examples:

"rfquotek Sir M. Hale"
Intensive as an adjective:

Characterized by persistence; intent; assiduous.

Examples:

"rfquotek Sir H. Wotton"
Intensive as an adjective (grammar):

Serving to give force or emphasis.

Examples:

"an intensive verb or preposition"
Intensive as an adjective (medicine):

Related to the need to manage life-threatening conditions by means of sophisticated life support and monitoring.

Examples:

"She was moved to the intensive-care unit of the hospital."

Intensive as a noun (linguistics):

Form of a word with a stronger or more forceful sense than the root on which the intensive is built.

Proper as an adjective:

Suitable. Suited or acceptable to the purpose or circumstances; fit, suitable. Following the established standards of behavior or manners; correct or decorous.

Examples:

"the proper time to plant potatoes"

"a very proper young lady"
Proper as an adjective:

Possessed, related. Used to designate a particular person, place, or thing. Proper nouns are usually written with an initial capital letter. Pertaining exclusively to a specific thing or person; particular. In the strict sense; within the strict definition or core (of a specified place, taxonomic order, idea, etc). Belonging to oneself or itself; own. Portrayed in natural or usual coloration, as opposed to conventional tinctures. Being strictly part of some other (not necessarily explicitly mentioned, but of definitional importance) thing, and not being the thing itself. Eigen-; designating a function or value which is an eigenfunction or eigenvalue.

Examples:

"usex [[proper subset]] — [[proper ideal]]"
Proper as an adjective:

Accurate, strictly applied. Excellent, of high quality; such as the specific person or thing should ideally be. (Now often merged with later senses.) Attractive, elegant. In the very strictest sense of the word. Utter, complete.

Examples:

"Now that was a proper breakfast."

"When I realized I was wearing my shirt inside out, I felt a proper fool."

Proper as an adverb (UK, colloquial):

properly; thoroughly; completely
Proper as an adverb (nonstandard, colloquial):

properly