Nouns which lose an internal vowel in Turkish - Apocopating Nouns

Definition of grammar term: Apocopate
verb. - To cut off or drop; as, to Apocopate a word, or the last letter, syllable, or part of a word.
adj. - Shortened by apocope; as, an Apocopate form.

This is a comprehensive list of Turkish nouns which lose their final vowel (apocopate) when a suffix which itself begins with a vowel is added to the noun.
As an example: izin - leave, time off - becomes izn-im [NOT izin-im] - my leave (ie the final vowel of the noun root is dropped when adding a suffix which begins in a vowel.

Adding a vowel does affect the Noun
iznim - my leave - iznimden - [izn-im-den] - since my time off..
The Final Vowel in the noun is lost when adding -im - my.. suffix (which begins with a vowel)

Adding a consonant does NOT affect the Noun
izindeyim - [izin-de-yim] - I am on leave..
Here the vowel of izin is not lost as the first suffix -de begins with a consonant.

Some Examples of Possessive Adjectives being added

fikrimiz - our idea - from fikir
keyfi - his/her joy - from keyif
oğlum - my son - from oğul
boynu - his neck - from boyun
nakdi - his cash - from nakit
ahdi - his injunction - from ahit
In the last two examples above that the final consonant -t has Mutated to its soft form -d.
kaybı - his loss - from - kayıp also undergoes a softening of the consonant -p to -b.

We can thus see that the rules of Consonant Mutation are still observed in the reduced form of the noun. There are some words in this list which do not soften their root vowel as they may be considered (a) Single Syllable Words or (b) Foreign Word Imports. As an example we cite: vakit (arb.) - time, occasion - which becomes - vaktim - my time

Some Examples of Case Suffixes being added

Mehmet emri vermiş - It seems Mehmet gave the order - (emr-i)
Here the Direct Object suffix -i affects the noun - emir - order/command
Ali'nin alnı terliyor - Ali's forehead is sweating - (Ali'nin aln-ı)
Here the word - forehead - is in the Possessive Relationship which affects the noun - alın - shortening it to aln-.

Note: That if we add a suffix which begins with a consonant, then the root word retains its basic form:
ağızda - in the mouth
beyinden - from the brain
kayıptan - from the loss
But of course the root word is shortened (apocopated) as stated above, if the first added suffix begins with a vowel:
ağzında - [ağz-ı-nda] - in his mouth
beynimden - [beyn-im-den] - from my brain
kaybımızdan - [kayb-ımız-dan] - from our loss

A Comprehensive Apocopating Noun List

Nouns which lose their final vowel from the root word. These particular nouns are to be shortened before adding any suffixes beginning with a vowel. This list is comprehensive to The Turkish Language as far as we know.

Many of these words - especially the parts of the body like burun - nose becomes burnum - my nose and beyin - brain becomes beynim - my brain etc. are in constant daily use therefore time should be taken to learn some of this list's common words.