Common words:
* Actual
* Brutal
* Central
* Chemical
* Critical
* Digital
* Essential
* Fatal
* Final
* General
* Global
* Initial
* Legal
* Local
* Medical
* Mental
* Natural
* Personal
* Physical
* Political
* Practical
* Professional
* Regional
* Social
* Spiritual
* Typical
* Usual
Less common words:
* Aboriginal
* Accidental
* Adrenal
* Algebraical
* Amalgamal
* Animal
* Annular
* Austral
* Basal
* Bestial
* Capricious
* Cerebral
* Coastal
* Colonial
* Commemorial
* Congenial
* Consequential
* Continental
* Coronal
* Decentral
* Doctoral
* Editorial
* Ephemeral
* Equatorial
* Eternal
* Exceptional
* Experimental
* Extrajudicial
* Facial
* Fictional
* Fiscal
* Floral
* Fluvial
* Focal
* Formal
* Fundamental
* Generational
* Geological
* Gradual
* Herbal
* Historical
* Hospital
* Hypothetical
* Idiosyncratical
* Imperial
* Incidental
* Industrial
* Infernal
* Inspirational
* Instrumental
* Intercostal
* International
* Irrational
* Judicial
* Lateral
* Literal
* Litoral
* Logistical
* Lunar
* Magnificent
* Mathematical
* Memorial
* Mercurial
* Metallurgical
* Microbial
* Migrational
* Mineral
* Miraculous
* Moral
* Municipal
* Musical
* National
* Naval
* Nocturnal
* Nominal
* Normal
* Notional
* Numeral
* Occasional
* Official
* Oral
* Orbital
* Organic
* Original
* Parental
* Patriotic
* Penal
* Perpetual
* Philanthropical
* Physical
* Pitiful
* Planetary
* Plural
* Political
* Postal
* Potential
* Practical
* Prejudicial
* Presidential
* Primary
* Principal
* Proverbial
* Provincial
* Psychological
* Radical
* Rational
* Recreational
* Refusal
* Regional
* Regular
* Relinquish
* Residential
* Ritual
* Rival
* Rural
* Sanguinal
* Satirical
* Sectional
* Secular
* Semiannual
* Senatorial
* Sequential
* Signal
* Simulational
* Skeletal
* Social
* Solar
* Special
* Spiritual
* Statistical
* Substantial
* Suburban
* Supernatural
* Temporal
* Terrestrial
* Testimonial
* Theatrical
* Theoretical
* Tropical
* Typical
* Universal
* Verbal
* Vertical
* Victual
* Visual
* Vocal
* Vulgar
* Zoological
This list is not exhaustive, but it includes some of the most common and less common words ending in "-al".