The Collaborative International Dictionary of English v.0.48:

In-going \In"-go`ing\, n.
   The act of going in; entrance.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

In-going \In"-go`ing\, a.
   Going; entering, as upon an office or a possession; as, an
   in-going tenant.
   [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

49 Moby Thesaurus words for "ingoing":
   access, admission, biting, clear-cut, crisp, cutting, entering,
   entrance, entree, entry, import, importation, importing, in,
   inbound, income, incoming, infiltration, inflooding, inflowing,
   ingress, ingression, ingressive, inner-directed, inpouring, input,
   insertion, insinuation, intake, interpenetration, introduction,
   introgression, introversive, introvert, introverted, intrusion,
   intrusive, invasive, inward, inward-bound, irruptive, leakage,
   penetrating, penetration, percolation, reception, seepage,
   subjective, trenchant