Synonyms and Antonyms for Impenetrable

Following is a list of 100 synonym words and phrases that are related to impenetrable:

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5 Letter Words

heavydensethicktight

6 Letter Words

opaquesealedclosed

7 Letter Words

unclearobscure

8 Letter Words

unporouspassless

9 Letter Words

inaudiblenonporousunhidable

10 Letter Words

impassablemysteriouswatertightimperviousunyieldingimpermeantunpassablebreachlessunpennableimpassibleunpassibleunpervadedunhailableunexpiableimprenableinviolableunpoppable

11 Letter Words

insuperableinscrutableimpregnableimpermeablebulletproofunpermeatedimperviableunpermeableuninvadableunenterableunimpedibleunpregnableunleachable

12 Letter Words

inaccessibleunfathomableunbreachableunassailableinvulnerableunpenetrableinpenetrableunpenetratedimpierceableunpierceablenonpenetrantnonpermeableimperforableunbypassableinexpugnableunintrudableunrepellablenonpermeatedunbroachableundeterrableindetectableunimpairableunimpugnableuncombatable

13 Letter Words

inconceivablenonpenetrableunpenetrativenonpenetratedunimpregnableunpenetratingunpuncturableintransitablenonpermeatingnonpermutablenonattackableunassaultablenondamageableunsusceptible

14 Letter Words

insurmountableunintelligibleindecipherableunimpenetrableimpertransiblenonpenetratingunpermeablizednonpenetrativenonpuncturablenontraversableuncontaminableunapproachable

15 Letter Words

unpermeabilized

16 Letter Words

uncomprehensibleincomprehensibleintransgressiblenonpermeabilized

17 Letter Words

nonpermeabilizing

Using this list of similar-meaning words, you can choose the best synonyms to replace impenetrable in your sentences.

Additionally, you'll find antonyms included, perfect for when you need the complete opposite meaning of impenetrable in your writing.