Words to Describe milestones

How milestones often is described ("________ milestones")

• intermediate
• notable
• principal
• cognitive
• delayed
• elusive
• certain
• various
• clear
• several
• crucial
• specific
• emotional
• historic
• interim
• linguistic
• normal
• physical
• defined
• legislative
• maturational
• important
• appropriate
• gross
• measurable
• historical
• usual
• critical
• neurologic
• predetermined
• key
• frequent
• identifiable
• strategic
• behavioral
• technological
• realistic
• following
• typical
• successive
• early
• significant
• major
• developmental
• roman
• technical