What words contain synonyms (and antonyms) within them?

Repeated:
disclosure -> clue -> cue
expurgated -> purged -> pure
frangible -> fragile -> frail

Two-way:
chariot -> cart, car
container -> can, tin
community -> county, city
deteriorated -> rot, die
feasted -> ate, fed
rampage -> rage, rape
routine -> rote, rut

Reverse two-way:
exhilaration, exultation -> elation
irritated, infuriated -> irate
jollity, jocularity -> joy
playfulness, facetiousness -> fun
postured, positioned -> posed
lighted, illuminated -> lit
observe, spectate -> see
formalities, christenings -> rites
brobdingnagian, lumbering -> big
feast, breakfast -> eat
purged, pasteurized -> pure
expostulate, stipulate -> state

Reverse three-way:
enthusiast, neurotic, nougat -> nut
perversion, misdoing, transgression -> sin
slinky, slipperly, stealthy -> sly

Reverse many-way:
falsities, falsifies, fallacies, calumnies, plagiarizes, hyperbolizes,
  reclines -> lies
deceased, departed, deactivated, decayed, decimated, decapitated,
  deteriorated, disintegrated, desiccated -> dead

Two-way (one antonym):
encourage -> urge, enrage
feast -> eat, fast

One-way:
accurate -> acute
adroitness -> art
appropriate -> apt
astound -> stun
barren -> bare
bitterness -> ire
blossom -> bloom
catacomb -> tomb
charisma -> charm
compartment -> pen
dazzle -> daze
elevate -> elate
flourishing -> lush
grenadine -> red
himself -> he
interregnum -> term
knapsack -> pack
loneliness -> oneness
municipality -> city
myself -> me
nourished -> nursed
overbearing -> vain
pastille -> pill
perambulate -> ramble
plagiarist -> liar
precocious -> precious
quiescent -> quiet
rapscallion -> rascal
satisfied -> sate
scoundrel -> cur
secure -> sure
stingy -> tiny
supervisor -> superior
tolerate -> let
twitch -> tic
variegated -> varied
welded -> wed
yearning -> yen

Antonyn:
avoid -> aid
deify -> defy
friend -> fiend
gullible -> glib
intimidated -> intimate
patriarch -> pariah

Adjacent:
aberrant -> errant
accident -> dent
belated -> late
blotch -> blot
cartoon -> art
cavern -> cave
enjoyment -> joy
exist -> is
factual -> actual
history -> story
ramble -> amble
perimeter -> rim
umpteenth -> nth

Related etymology:
amicable -> amiable
armaments -> arms
contradictory -> contrary
circumambulate -> circulate
cleansed -> cleaned
definitive -> definite
disembark -> debark
equitable -> equal
hyperbole -> hype
imagining -> imaging
incapability -> inability
market -> mart
nestled -> nested
obligated -> obliged
pantaloons -> pants
partially -> partly
platter -> plate
prattle -> prate
primeval -> primal
primordial -> primal
revolution -> revolt
staiate -> sate
splatter -> spatter
splutter -> sputter
technological -> technical
trustworthy -> trusty