| hard-working(adjective, careful, earnest, thorough, strenuous) |
| hardheaded(adjective, strong, hard, tough, severe) |
| harsh(adjective, strong, hard, tough, severe) |
| implacable(adjective, strong, hard, tough, severe) |
| in a groove(expression, adjective, idiom, exact, regular) |
| in line(expression, adjective, solid, modest, polite) |
| inexorable(adjective, strong, hard, tough, severe) |
| inflexible(adjective, strong, hard, tough, severe) |
| iron-fisted(adjective, severe, harsh, stiff, rigid) |
| ironclad(adjective, severe, harsh, stiff, rigid) |
| law(noun, style, rule, practice, system) |
| layout(noun, style, rule, practice, system) |
| logical(adjective, exact, careful, regular, precise) |
| manner(noun, style, rule, practice, system) |
| manners(noun, style, rule, practice, system) |
| method(noun, style, rule, practice, system) |
| methodized(adjective, exact, careful, regular, neat) |
| meticulous(adjective, exact, careful, regular, precise) |
| mode(noun, style, rule, practice, system) |
| mortified(adjective, strong, hard, tough, severe) |