Well-established

adj.capable, resilientprofessional

What it means

Firmly recognized or operating successfully after sufficient time and evidence.

Reach for it when describing a practice, fact, organization, or reputation with a stable track record

The well-established clinic had served three generations without losing its neighborhood focus.

playful
tried and true
when dependable history should sound friendly
not when Tried and true implies resistance to change and is too conversational for evidence claims.
everyday
established
when recognized existence or position is the main fact
not when Established is neutral and may refer to something only recently set up.
warm
reputable
when a trustworthy public reputation deserves emphasis
not when Reputable evaluates standing, not whether the organization is mature or secure.
professional
proven
when repeated results provide the strongest reason for trust
not when Proven can apply to a method without longevity or broad recognition.
professional
recognized
when public or expert acceptance matters
not when Recognition can be recent and does not establish operational stability.
formal
institutionalized
when a practice is embedded in formal structures
not when Institutionalized can suggest bureaucracy or harmful permanence.
formal
long-standing
when duration is the important quality
not when Long-standing arrangements may be weak, disputed, or ineffective.
literary
entrenched
when deep roots resist change
not when Entrenched often carries criticism and is wrong for flexible success.

well-established practice
Peer review is a well-established practice, though its quality still depends on execution.
well-established company
The well-established company opened its training rooms to local apprentices.
well-established fact
It is a well-established fact that the two records came from different systems.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.