The difference between Incomplete and Proper

When used as adjectives, incomplete means not complete, whereas proper means suited or acceptable to the purpose or circumstances.

Incomplete is also noun with the meaning: a multipart file posted to usenet that is incomplete and thus unusable.

Proper is also adverb with the meaning: properly.

check bellow for the other definitions of Incomplete and Proper

Incomplete as an adjective:

Not complete; not finished
Incomplete as an adjective (botany):

Of a flower, wanting any of the usual floral organs.

Incomplete as a noun (Internet):

Something incomplete. A multipart file posted to Usenet that is incomplete and thus unusable. A multiplayer game that is abandoned because one player disconnects.
Incomplete as a noun:

A designation of being incomplete.

Examples:

"He got four incompletes out of five courses last semester."

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