The whole gospel or the gospel with a hole

Things not found, unless someone would like to correct me in the comment, in the Book of Mormon, which has the 'fullness of the everlasting gospel'.

Becoming gods ourselves 

A premortal existence

God being the literal Father of our spirits conceived by Him and our 'Heavenly Mother'

The Baptism for the dead

The Aaronic or Melchizedek order of The Priesthood

A mention of secret rituals as part of 'the gospel'

Exaltation or Endowment

Eternal marriage in a Mormon Temple

The Word of Wisdom

'The plain and precious parts' removed from the Bible

Paying honest tithes and offerings 

Searching out your kindred dead and perform the saving ordinances of the gospel for them. 

The Mormon Church organisation 

The plurality of gods

God (Elohim) being an exalted man

The 'three degrees of glory'

Plural marriage 

Temporary hell