| abstract(theoretical, abstruse, philosophical) |
| abstruse(abstract, theoretical, philosophical) |
| bodiless(abstract, theoretical, abstruse, philosophical) |
| deep(abstract, theoretical, abstruse, philosophical) |
| difficult(abstract, theoretical, abstruse, philosophical) |
| discarnate(abstract, theoretical, abstruse, philosophical) |
| esoteric(abstract, theoretical, abstruse, philosophical) |
| eternal(abstract, theoretical, abstruse, philosophical) |
| fundamental(abstract, theoretical, abstruse, philosophical) |
| high-flown(abstract, theoretical, abstruse, philosophical) |
| ideal(abstract, theoretical, abstruse, philosophical) |
| immaterial(abstract, theoretical, abstruse, philosophical) |
| impalpable(abstract, theoretical, abstruse, philosophical) |
| incorporeal(abstract, theoretical, abstruse, philosophical) |
| insubstantial(abstract, theoretical, abstruse, philosophical) |
| intangible(abstract, theoretical, abstruse, philosophical) |
| intellectual(abstract, theoretical, abstruse, philosophical) |
| jesuitic(abstract, theoretical, abstruse, philosophical) |
| metaphysical(adjective, physical, abstract, theoretical, presence) |
| mystical(abstract, theoretical, abstruse, philosophical) |