Thesaurus.com
Dictionary.com
Showing results for rock solid. Search instead for rockidols.

rock solid

ADJECTIVE
trustworthy/trusty
Synonyms
WEAK
accurate always there authentic authoritative convincing credible dependable ethical exact honest honorable kosher levelheaded mature on the level on the up and up open plausible principled realistic responsible righteous saintly secure sensible solid square steadfast straight there to be trusted tried tried-and-true true true-blue trustable truthful unfailing up-front upright valid veracious
Antonyms
WEAK
corrupt unbelievable undependable unreliable untrustworthy
ADJECTIVE
unfailing
Synonyms
STRONGEST
bottomless boundless eternal inexhaustible steadfast unflagging
WEAK
absolute assiduous ceaseless come-through consistent constant continual continuing continuous counted-on delivering dependable diligent dyed-in-the-wool endless faithful infallible invariable loyal never-failing persistent reliable same solid staunch straight sure surefire there tried-and-true true trustworthy unlimited unrelenting
Antonyms
STRONGEST
changing limited
WEAK
failing impermanent uncertain unsure
ADJECTIVE
well-founded
Synonyms
WEAK
based on hard data based on hard facts factual proven solid substantiated

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"Taiwan is responsible for safeguarding our own country," Lai told AFP, insisting the US-Taiwan relations were "rock solid".

From Barron's • Feb. 12, 2026

The fundamentals of the argument were rock solid.

From Slate • Feb. 12, 2026

Swiatek's service game had not been rock solid, while the quicker courts at Melbourne Park have historically led to problems against aggressive opponents.

From BBC • Jan. 27, 2026

The Eagles' back three of Chris Richards, Lacroix and Guehi have been rock solid, even though Palace lost influential captain Guehi after 61 minutes at Wembley following a blow to the head.

From BBC • May 17, 2025

Aimee talked to me about adding hours to my training regimen so that I could become so rock solid on all my skills, I could go out and just enjoy myself in competition.

From "Courage to Soar" by Simone Biles