super-duper
adjective
su·per-du·per ˈsü-pər-ˈdü-pər 
: of the greatest excellence, size, effectiveness, or impressiveness
Synonyms
- astronomical
- astronomic
- Brobdingnagian
- bumper
- colossal
- cosmic
- cosmical
- cyclopean
- elephantine
- enormous
- galactic
- gargantuan
- giant
- gigantesque
- gigantic
- grand
- herculean
- heroic
- heroical
- Himalayan
- huge
- humongous
- humungous
- immense
- jumbo
- king-size
- king-sized
- leviathan
- mammoth
- massive
- mega
- mighty
- monster
- monstrous
- monumental
- mountainous
- oceanic
- pharaonic
- planetary
- prodigious
- super
- supersize
- supersized
- titanic
- tremendous
- vast
- vasty
- walloping
- whacking
- whopping
See all Synonyms & Antonyms 
Word History
Etymology
reduplication of super entry 1
First Known Use
1938, in the meaning defined above
super-duper
adjective
as in giant
unusually large their super-duper ice cream sundaes are true diet busters Synonyms & Similar Words
Relevance
- giant
- gigantic
- huge
- massive
- vast
- enormous
- tremendous
- colossal
- super
- mammoth
- bumper
- astronomical
- mighty
- monumental
- immense
- mega
- big
- monster
- titanic
- monstrous
- mountainous
- great
- astronomic
- cosmic
- grand
- sizable
- humongous
- oceanic
- heroic
- gargantuan
- planetary
- jumbo
- prodigious
- galactic
- oversize
- whopping
- elephantine
- good
- supersized
- cyclopean
- whacking
- herculean
- handsome
- oversized
- humungous
- leviathan
- pharaonic
- king-sized
- substantial
- supersize
- heroical
- walloping
- majestic
- formidable
- king-size
- extensive
- considerable
- vasty
- gigantesque
- cosmical
- major
- Himalayan
- tidy
- imposing
- Brobdingnagian
- gross
- hulking
- voluminous
- bulky
- staggering
- infinite
- hefty
- overgrown
- stupendous
- grandiose
- goodly
- outsize
- lofty
- monolithic
- overwhelming
- august
- towering
- outsized
- largish
- cavernous
- sizeable
- boundless
- immeasurable
Antonyms & Near Antonyms
- tiny
- miniature
- micro
- microscopic
- teeny
- diminutive
- wee
- minuscule
- teensy
- bitty
- little
- pocket
- infinitesimal
- little bitty
- small
- midget
- mini
- microscopical
- puny
- pygmy
- smallish
- petite
- bantam
- minute
- microminiature
- dinky
- undersized
- teensy-weensy
- teeny-weeny
- undersize
- Lilliputian
- pint-sized
- dwarfish
- pint-size
- half-pint