| in-house(adjective, inside, central, interior, inner) |
| innermost(adjective, remote, intimate, secret, private) |
| mental(adjective, bodily, inward) |
| privy(adjective, intimate, secret, private, penetrating) |
| pyloric(adjective, interior, viscera, splanchnic, internal organs) |
| unthinking(adjective, natural, emotional, instinctive, automatic) |
| affective(adjective, emotional, sentimental, intuition, interior) |
| alimentary(adjective, stomach, intestinal, intestine, pertaining to) |
| bodily(adjective, body, physical, personal, instinctive) |
| celiac(adjective, stomach, intestinal, intestine, pertaining to) |
| deep(adjective, intimate, secret, private, personal) |
| heartfelt(adjective, gut, intuitive) |
| immediate(adjective, intimate, perceptive, secret, private) |
| subconscious(adjective, physical, individual, essential, secret) |
| glandular(adjective, interior) |
| autogenous(adjective, inside, central, interior, inner) |
| bowel(noun, adjective, stomach, intestinal, intestine) |
| colonic(adjective, interior) |
| core(noun, adjective, inside, interior, inner) |
| endogenous(adjective, inside, central, interior, inner) |