Synonyms of complex
21 similar words · 51 opposite words
Another word for complex is complicated. Other synonyms of complex are detailed, difficult, hard, intricate and involved.
Synonyms and similar words for complex
adjectiveNot simple, easy, or straightforward; complicated.
nounA group of closely related species, often distinguished only with difficulty by traditional...
- species complexA group of closely related species so similar in appearance that the boundaries between them are often unclear.
- species groupSynonym of species complex.
- species aggregateSynonym of species complex.
nounA group of emotionally charged ideas or mental factors, unconsciously associated by the individual...
- constellationSynonym of complex (“a collection of ideas caused by repressed emotions that leads to an abnormal mental condition”).
adjectiveMore synonyms
- convolutedComplex, complicated, or intricate.
- Gordian
- involuteHaving a complex pattern of coils in which younger whorls only partly surround older ones.
- involutional
- knottyComplicated or tricky; complex, difficult.
- labyrinthal figurativelyLike a maze or labyrinth, intricate or convoluted. labyrinthine.
- labyrinthine figuratively
- manifold
- complexed obsoleteCombined in the form of a complex.
- complicate poetic, rareComplex, complicated.
Opposite of complex
adjectiveNot simple, easy, or straightforward; complicated.
- basic
- easy
- simpleConsisting of one single substance; uncompounded.
- simplexHaving a single structure; not composite or complex; undivided, unitary.
- straightforward
- as a duck takes to waterSynonym of like a duck takes to water.
- prosaic
- no-fuss
- easy as 123Extremely easy.
- easy as ABCExtremely easy.
- easy as cakeSynonym of easy as pie.
- easy as pieVery easy.
- easy as falling off a logVery easy.
- easy as rolling off a log
- easy as toffeeVery easy.
- easy-breezyLaid-back and uncomplicated.
- easy peasyVery easy, simple.
- easy peasy Japanesey
- easy peasy lemon squeezyQuick and easy.
- eathEasy; not hard or difficult.
- effortlessWithout effort.
- facile
- idiotproof
- light
- like a duck takes to waterVery naturally; without effort.
- like falling off a log
- like riding a bikeSaid of a skill that, once learned, is never forgotten.
- like robbing a babySynonym of like taking candy from a baby.
- like shelling peasRepetitive, but very easy.
- like shooting fish in a barrelExtremely easy; sometimes with a connotation of triumph but at other times with a connotation of being meaningless and...
- like taking candy from a babyVery easy to achieve.
- natural
- painless
- piss-easy Australia, UKVery easy.
- plain-sailingEasy, simple, straightforward.
- simple as kiss your handVery easy.
- smooth
- soft
- trivial
- troublefree
- unchallengingNot challenging; easy to do.
- uncomplicatedSimple; not complicated; basic.
- undemandingNot demanding.
- undifficultNot difficult.
- yezzy dialectal, obsoleteEasy.
adjectiveMore antonyms
- incomplexNot complex; simple.
- noncomplexNot complex.
- noncomplicatedNot complicated.
- uncomplexNot complex; synonym of simple.
- uncomplexedNot formed into a complex.
- unconvolutedNot convoluted.
Meaning of complex
- adjective Made up of multiple parts; composite; not simple.
- adjective Not simple, easy, or straightforward; complicated.
- adjective Having the form a + bi, where a and b are real numbers and i is (by definition) the imaginary square root of −1.
complex in other languages
Questions about synonyms of complex
- What is another word for complex?
- Complex has 21 synonyms on Word.ws, such as complicated, detailed, difficult, hard, intricate, involved, tough and species complex.
- What is the opposite of complex?
- The opposite of complex is simple. Other antonyms of complex are plain-sailing, effortless, uncomplicated, basic and easy.
- What does complex mean?
- Complex means made up of multiple parts; composite; not simple.
Source and license
Adapted from Wiktionary: complex (page history and authors) and the entries of the words listed. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws grouped the synonyms and antonyms by meaning and added links. Wiktionary data of 2026-09-02.
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Cite this page: “Synonyms of complex.” Word.ws, https://word.ws/synonyms/complex. Based on Wiktionary, CC BY-SA 4.0.