Synonyms for rigorous

Adjective

1. rigorous, strict, exact (vs. inexact)

usage: rigidly accurate; allowing no deviation from a standard; "rigorous application of the law"; "a strict vegetarian"

2. rigorous, stringent, tight, demanding (vs. undemanding)

usage: demanding strict attention to rules and procedures; "rigorous discipline"; "tight security"; "stringent safety measures"

3. brutal, cruel, harsh, rigorous, unkind, hard (vs. soft)

usage: used of circumstances (especially weather) that cause suffering; "brutal weather"; "northern winters can be cruel"; "a cruel world"; "a harsh climate"; "a rigorous climate"; "unkind winters"