- ancient
- deep
- great
- high
- matured
- noble
- old
- secret
Synonyms for altus
- abavus – great
- abnepos – great
- antiquus – ancient, hoary, old
- carus – beloved, costly, dear, expensive, high
- grandaevus – aged, old
- grandis – great
- ingenuitas – frankness, free birth, noble, openness
- ingenuus – free, honorable, noble, upright
- internus – deep, inward
- magnus – great, important, large
- maior – great, important, large
- maximus – best, great, important, large
- multus – great, much
- optimus – aristocrat, noble, one of the best
- priscus – ancient, antique, former, old days, venerable
- pristinus – ancient, former, venerable
- proavus – great
- profundus – boundless, deep, dense, high, profound, thick
- pronepos – great
- proneptos – great
- provectus – aged, ced, ced in age, ced in years, old
- secretum – private, retired, secret, secret conversation, solitary, to separate
- senex – aged, old, old man
- senis – aged, old, old man
- specialis – confidential, initimate or special friend, secret
- valde – exceedingly, extremely, great, greatly, intensely, powerfully, strongly, very, very much
- vetus – old