Synonyms for viperous

Most common

reptilian · dastardly · booky · guileful

All synonyms

Adjective

Definitions

1. adj. 1

   venomous, malicious or treacherous

Example sentences

• reptilian Tom's eyes are strange. I think he might be a reptilian.
• dastardly These dastardly acts will not go unpunished.

Popularity over time

Use in printed books, per decade from 1850 to 2019.

By length

5 letters

booky

6 letters

guiled

7 letters

ratlike

8 letters

guileful, viperish

9 letters

reptilian³, dastardly³

10 letters

reptitious

The small number after each word is its number of syllables (reptilian³ = 3 syllables).