| certainly | firmly, steadfastly, unalterably |
| constancy | fortitude, self-control, steadfastness |
| constancy | persistence, perseverance, steadfastness |
| constant | faithful, steadfast, true |
| constantly | resolutely, steadfastly, steadily |
| desperate | deadly serious, bold, steadfast |
| earnestly | steadfastly, intently |
| even | steady, steadfast, unwavering |
| fast | constant, firm, steadfast |
| fast | constantly, firmly, steadfastly |
| fastened | determined, steadfast, confirmed |
| firm | constant, steadfast, resolute |
| level | steady, steadfast, constant |
| resolve | constancy, firmness of purpose, steadfastness |
| settled | steady, steadfast, staunch |
| settled | calm, steadfast, composed |
| stanch | water-tight, steadfast, firm |
| stand | maintain, uphold, be steadfast in |
| stand | be steadfast, stand firm, make a stand |
| staunch | water-tight, steadfast, firm |
| stick | persist, stand firm, be steadfast |
| sure | loyal, trustworthy, steadfast |
| unsteadfast | unsteady, precarious, not firm |
| virtuously | steadfastly, strongly, powerfully |
| wishtly | fixedly, intently, steadfastly |