| Firm |
| Solid |
| Fixed |
| Tense |
| Severe |
| Strict |
| Set ___ |
| Obdurate |
| Not limp |
| Exacting |
| Unbending |
| Unvarying |
| Draconian |
| ___ stiff |
| Boardlike |
| Stringent |
| Steely __ |
| Unyielding |
| Unwavering |
| Intolerant |
| Hard-nosed |
| Not pliant |
| Inflexible. |
| Unforgiving |
| By the book |
| Infrangible |
| Not flexible |
| Strait-laced |
| Hardly pliant |
| Uncompromising |
| Having no flex |
| Like drumstick |
| Unable to bend |
| Like some rules |
| Kind of airship |
| Far from pliant |
| Unlikely to bend |
| Like a drumstick |
| Not chill at all |
| Stiff as a board |
| Unwilling to bend |
| Like a hard-liner |
| Fixed in position |
| Set in one's ways |
| Far from flexible |
| Taking a hard line |
| Scrupulously exact |
| Unwilling to yield |
| Unwilling to compromise |
| Like rules at fancy show |
| Like uptight concertgoer |
| Like a dirigible, vis-a-vis a blimp |
| Like a zeppelin, as opposed to a blimp |