1) Beneath the surface 2) Beyond the obvious 3) Beyond what is openly said 4) Concealed 5) Covert 6) English rock music group 7) Future 8) Guarded 9) Hidden 10) Intentionally concealed 11) Intentionally hidden 12) Intentionally kept concealed 13) Kind of motive 14) Like some motives 15) Remote 16) Subterranean 1) Covert 2) Later 3) Subsequent 
For the London based band, see Ulterior (band) ...
• (a.) Further; remoter; more distant; succeeding; as, ulterior demands or propositions; ulterior views; what ulterior measures will be adopted is uncertain. • (n.) Ulterior side or part. • (a.) Situated beyond, or on the farther side; thither; -- correlative with hither.
situated beyond 
[adj] - beyond or outside an area of immediate interest
adjective beyond or outside an area of immediate interest; remote; `a suggestion ulterior to the present discussion`; `without...any purpose, immediate or ulterior`- G.B.Shaw
being beyond what is seen or avowed; intentionally kept concealed: ulterior motives. · coming at a subsequent time or stage; future; further: ulterior action. · lying beyond or outside of some specified or understood boundary; more remote: a suggestion ulterior to the purposes of the present discussion.
[SAT terms] lying beyond what is openly revealed or avowed lying beyond what is openly revealed or avowed[Intelligent words] lying beyond what is openly revealed or avowed