| tranquil(adjective, calm, quiet, friendly, serene) |
| all quiet(expression, calm, quiet, friendly, steady) |
| aloof(detached, unconcerned, impartial, unbiased, removed) |
| amiable(adjective, peaceable) |
| at peace(expression, calm, quiet, friendly, steady) |
| bland |
| bloodless(calm, quiet, friendly, steady, serene) |
| bystanding(adjective, indifferent, detached, aloof, unconcerned) |
| civilian |
| clinical(adjective, indifferent, detached, aloof, unconcerned) |
| collected(calm, quiet, friendly, detached, unconcerned) |
| complacent(adjective, peaceable) |
| composed(calm, quiet, friendly, serene) |
| constant(calm, quiet, friendly, steady, serene) |
| cool(detached, unconcerned, impartial, unbiased, removed) |
| detached(unconcerned, impartial, unbiased, removed, nonaligned) |
| disengaged(adjective, indifferent, detached, aloof, unconcerned) |
| disinterested(detached, unconcerned, impartial, unbiased, removed) |
| dispassionate(detached, unconcerned, impartial, unbiased, removed) |
| easeful(calm, quiet, friendly, steady, serene) |