Solid
Hard
Sound
Synonyms: Well built, sound, strong, stout, stable, well constructed, substantial, sturdy, and durable.
Valid
Synonyms: Well founded, valid, reasonable, weighty, convincing, plausible, reliable, firm, trustworthy, steadfast, staunch, unwavering, level-headed, decent, upright, worthy, secure, of good financial standing, profit-making, debt-free, in credit, out of debt, ungeared, unindebted, well grounded, sound, logical, authoritative, cogent, credible, dependable, unshakeable, stable, unfailing, constant, sensible, down-to-earth, law-abiding, upstanding, financially sound, creditworthy, in funds, able to pay its debts, solvent, not in debt, in the black, and unlevered.
Example Sentences
The table feels incredibly solid today.
He gave a solid performance yesterday.
They formed a solid partnership together.
Her argument is based on solid evidence.