The definition of an achievement is something that is accomplished, particularly by great effort, courage or special skills.
The definition of a discovery is something found, invented or uncovered.
An event, discovery, etc. considered as a high point or turning point in the history or development of something
A very short distance:
(Sports, broadcasting) A notable level of attainment or achievement.
Such a column standing alone as a monument
The annually recurring date of a past event, as of personal or historical importance:
A message posted in an electronic forum. [from 20th c.]
(Printing) A table with a smooth surface on which page forms are composed.
An act or gesture used to convey an idea, a desire, information, or a command:
Find another word for milestone. In this page you can discover 16 synonyms, antonyms, idiomatic expressions, and related words for milestone, like: achievement, breakthrough, discovery, event, landmark, sign, step, turning point, milestones, milepost and plateau.