There is no exhaustive list of grave matter things --but yes one could certainly point to many examples:
Missing Mass on Sunday or Holy Day (with out serious excuse -like illness or dispensation)
Hating ones parents
Serious disobedience
Leading someone into mortal sin
Serious detraction or calumnity
Desecration of the Eucharist
Stealing a car
Serious theft (either from the thing or circumstance etc)
Murder
Adultery
Sterilization
Masturbation
Abortion
Lying under oath
Drunkenness (where one looses ones reason for example)
Enslaving people
sacrificing to idols
Sorcery
Burning down someones house
Missing Sunday Mass (unless sick etc)
Sexual sins
pornography
IVF
Deliberate desire to kill or seriously wound a neighbor
Abortion
Contracepting before, during or after the marital act
Rejecting Christ
Gravely harming someone
Something gravely contrary to charity or justice
Serious lies
Serious scandal
Compendium issued by Pope Benedict XVI
- When does one commit a mortal sin?
1855-1861
1874
One commits a mortal sin when there are simultaneously present: grave matter, full knowledge, and deliberate consent. This sin destroys charity in us, deprives us of sanctifying grace, and, if unrepented, leads us to the eternal death of hell. It can be forgiven in the ordinary way by means of the sacraments of Baptism and of Penance or Reconciliation.
- When does one commit a venial sin?
1862-1864
1875
One commits a venial sin, which is essentially different from a mortal sin, when the matter involved is less serious or, even if it is grave, when full knowledge or complete consent are absent. Venial sin does not break the covenant with God but it weakens charity and manifests a disordered affection for created goods. It impedes the progress of a soul in the exercise of the virtues and in the practice of moral good. It merits temporal punishment which purifies.
vatican.va/archive/compendium_ccc/documents/archive_2005_compendium-ccc_en.html
(Note: mortal sin and grave sin are synonyms in the Church).