| absolute | inflexible, uncompromising, intransigent |
| best-boding | most favourable, most promising |
| fair | successfully, promisingly, favourably |
| fairly | promisingly, favourably, propitiously |
| forward | promising, early-maturing, precocious |
| fruitful | promising, full of potential, talented |
| hopeful | promising, giving hope of success |
| likely | promising, hopeful; or: seemly, good-looking |
| prodigious | ominous, portentous, promising evil |
| saying | promising, affirmation, assertion |
| stubborn | uncompromising, unyielding, obstinate |
| sturdy | disobedient, defiant, uncompromising |
| toward | promising, bold, future |
| unauspicious | inauspicious, discouraging, unpromising |
| unmitigable | implacable, unappeasable, uncompromising |