achievˈable adjective

achieveˈment noun

1. Achieving
2. Something achieved
3. An exploit
4. An escutcheon or armorial shield granted in memory of some achievement (heraldry)
5. Escutcheon, armour, etc, hung over a tomb
6. A hatchment

achievˈer noun

achievement age noun

The level of an individual's educational achievement as determined by comparing his or her score in a test with the average score of others of the same age

achievement quotient noun

Ratio of achievement age to chronological age (usu ×10; abbrev AQ)