Graduation

5 clues
This puzzle's theme
Sheepskin presentation
When one becomes eligible for college
When Harry Highschool becomes Joe College
I've always known you were a Pretty Huge Deal ... but now it's official! Congrats, Doctor!
Similar answers:
Abbreviation
Abbreviations
Aberration
Aberrations
Abjuration
Ablation
Abomination
Acceleration
Accreditation
Accumulation
Accusation
Accusations
Acestationzebra
Acmecorporation
Acrossthenation
Activation
Activations
Actofabdication
Adaptation
Adestination