thats no doubt a raceme(spike) of a phal cornu-cervi. the term is interchangeable for ease and practical purposes but incorrect to call this a spike as it is a raceme.
A raceme is an unbranched, indeterminate inflorescence with pedicellate (having short floral stalks) flowers along the axis.
A spike is a type of raceme with flowers that do not have a pedicel.
so you see there is a difference as the cornu cervi does have pedicellate flowers along the axis which would make it a raceme
thats worth double