1. Accede, Concede, Exceed

Accede: Argue / succeed
Concede: Admit
Exceed: To be greater than

2. Accept, Except

Accept: To consent
Except: Exclude from

3. Abstain, Refrain

Abstain: Do without
Refrain: To hold back from doing something

4. All together, Altogether

All together: Together
Altogether: Without any doubt

5. Access, Accession, Excess

Access: Way to a place
Accession: Coming in office
Excess: More than expectation

6. Adapt, Adept, Adopt

Adapt: Make something suitable for new needs to become familiar
Adept: Expert
Adopt: To accept to take and use

7. Admission, Admittance

Admission: Being admitted; confession
Admittance: Being admitted to a place that is not public

8. Affect, Effect

Affect (V): Have an influence
Effect (N): Result / outcome

9. Admit, Acknowledge, Confess

Admit: More general
Acknowledge: Stonger than admit
Confess: To accept something wrong

10. Adverse, Averse

Adverse: Unfavourable
Averse: Opposed / disinclined