We don't have synonyms for keyseat yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are keyset and key seat.
(n) :
A bed or groove to receive a key which prevents one mechanical part from turning on another; especially, one with blind ends and a press-fit, such as one that seats a Woodruff key.
(n) :
A bed or groove to receive a key which prevents one mechanical part from turning on another; especially, one with blind ends and a press-fit, such as one that seats a Woodruff key.