axiomatic (adj.)
- absolute
- actual
- aphoristic
- apparent
- clear
- confirmable
- crisp
- demonstrable
- discernible
- distinct
- epigrammatic
- evident
- explicit
- express
- factual
- formulaic
- gnomic
- historical
- incontestable
- incontrovertible
- indisputable
- indubitable
- irrefutable
- manifest
- noticeable
- observable
- obvious
- open-and-shut
- palpable
- patent
- perceivable
- perceptible
- perspicuous
- pithy
- plain
- platitudinous
- pointed
- provable
- proverbial
- pungent
- real
- seeable
- self-evident
- self-explanatory
- sententious
- succinct
- tangible
- terse
- testable
- unanswerable
- undeniable
- unimpeachable
- unmistakable
- unquestionable
- verifiable
- visible