Yes, essentially they refer to the same category of hard-to-verify emails, but the terminology depends on the tool you use.
SMTP verification tools (like ZeroBounce, NeverBounce, MillionVerifier) classify them as Catch-All or Accept-All because that describes the server behavior — the domain's mail server is configured to catch all incoming messages.
Data providers and enrichment tools (like Apollo, Cognism, ZoomInfo) classify them as Risky or assign low confidence validation scores because from their perspective, the email's deliverability is uncertain.
Regardless of the label, the core problem is the same: standard verification methods cannot determine whether the individual mailbox actually exists and will deliver your message to a real person.
Scrubby bridges this gap by going beyond SMTP checks and actually testing deliverability at the inbox level.