radical (n.)
- aboriginal
- absolute
- accidence
- acid
- acidity
- affix
- affixation
- agent
- agitator
- aliquot
- alkali
- alkalinity
- all-out
- allomorph
- anarchist
- anion
- antacid
- arrowhead
- atom
- base
- basement
- basic
- basis
- bed
- bedding
- bedrock
- beginning
- born
- bottom
- broad
- cardinal
- cation
- central
- chain
- character
- chemical
- clean
- clear
- commencement
- communist
- compound
- comprehensive
- conception
- conjugation
- constituent
- constitutional
- copolymer
- corrective
- cuneiform
- cutting
- cycle
- decimal
- declension
- deep
- derivation
- determinative
- differential
- dimer
- dyad
- element
- entire
- essential
- even
- exponential
- extreme
- extremist
- fanatic
- finite
- floor
- flooring
- footing
- formative
- foundation
- fundament
- fundamental
- genesis
- germinal
- greatest
- ground
- grounds
- groundwork
- gut
- hardpan
- head
- heptad
- heterocycle
- hexad
- hieroglyph
- hieroglyphic
- ideogram
- ideograph
- imaginary
- impossible
- inception
- infinite
- infix
- inflection
- insurgent
- insurrectionist
- integral
- intensive
- ion
- irrational
- isomer
- kana
- larboard
- lattice
- left
- left-winger
- leftist
- liberal
- logogram
- logograph
- macromolecule
- material
- meliorist
- militant
- molecule
- monad
- monomer
- morph
- morpheme
- morphology
- morphophonemics
- most
- natural
- negative
- nihilist
- numeral
- numerary
- octad
- odd
- omnibus
- ordinal
- organic
- origin
- original
- origination
- oxyacid
- pair
- paradigm
- pavement
- pentad
- perfect
- pictograph
- pink
- pinko
- plain
- plumb
- polymer
- port
- positive
- possible
- prefix
- prefixation
- primary
- prime
- primitive
- principal
- principle
- progressive
- provenience
- pure
- radix
- rational
- reagent
- rebel
- reciprocal
- red
- reformatory
- reformer
- reformist
- regular
- revisionist
- revolutionary
- revolutionist
- ring
- rise
- root
- rudiment
- rune
- seat
- secessionist
- separatist
- shorthand
- sill
- sinister
- source
- stem
- stock
- straight
- substantive
- substratum
- substructure
- subversive
- suffix
- suffixation
- surd
- sweeping
- syndicalist
- taproot
- tetrad
- theme
- total
- triad
- trimer
- ultra
- ultraconservative
- undercarriage
- understructure
- universal
- utmost
- utopian
- utter
- uttermost
- verso
- vital
- wedge
- wholesale
- zealot
radical (adj.)
- aboriginal
- absolute
- acid
- advanced
- algorithmic
- aliquot
- all-embracing
- all-encompassing
- all-inclusive
- all-out
- anarchistic
- antacid
- basal
- base
- basic
- basilar
- bed
- beginning
- biochemical
- born
- bottom
- broad
- broad-minded
- cardinal
- cataclysmic
- catastrophic
- central
- chain
- chemical
- clean
- clear
- communist
- complete
- compound
- comprehensive
- congenital
- constituent
- constitutional
- constitutive
- consummate
- corrective
- counterclockwise
- crucial
- cuneiform
- cutting
- decimal
- deep
- deep-seated
- determinative
- differential
- digital
- downright
- drastic
- egregious
- elemental
- elementary
- embryonic
- entire
- essential
- even
- exhaustive
- exponential
- extreme
- extremist
- fanatic
- fanatical
- figural
- figurative
- finite
- floor
- fond
- formative
- fractional
- fundamental
- furthest
- generative
- genetic
- germinal
- greatest
- ground
- head
- hieroglyphic
- imaginary
- immoderate
- impossible
- infinite
- inherent
- insurgent
- insurrectionary
- integral
- intensive
- intrinsic
- ion
- irrational
- larboard
- left
- left-hand
- left-wing
- leftist
- levorotatory
- liberal
- logarithmic
- material
- militant
- most
- natural
- near
- negative
- nigh
- nihilistic
- numeral
- numerary
- numeric
- odd
- omnibus
- omnipresent
- ordinal
- organic
- original
- out-and-out
- outright
- perfect
- pervasive
- phonetic
- pink
- plain
- plumb
- port
- positive
- possible
- pregnant
- primal
- primary
- prime
- primeval
- primitive
- primordial
- principal
- pristine
- profound
- progressive
- pure
- rabid
- rational
- reciprocal
- red
- reformative
- reformatory
- reformist
- regular
- revolutionary
- ring
- rise
- rudimentary
- seminal
- separatist
- severe
- sheer
- shorthand
- sinister
- sinistral
- sinistrorse
- source
- stock
- straight
- substantial
- substantive
- subversive
- surd
- sweeping
- thorough
- thoroughgoing
- tolerant
- total
- transcendental
- ubiquitous
- ultra
- ultraconservative
- unconditional
- underlying
- universal
- unmitigated
- unqualified
- unreserved
- unrestricted
- utmost
- utopian
- utter
- uttermost
- veritable
- vital
- wholesale
- wide
