Synonyms of constant in English:

constant


See definition of constant

adjective

1‘the constant background noise of the city’

SYNONYMS
continual, continuous, persistent, sustained, abiding, round-the-clock
ceaseless, unceasing, perpetual, incessant, never-ending, everlasting, eternal, endless, unending, unabating, non-stop, perennial, unbroken, uninterrupted, unrelieved
interminable, unremitting, relentless, unrelenting, without respite
literary sempiternal
ANTONYMS

inconstant, fitful

2‘the disc revolves at a constant speed’

SYNONYMS
consistent, regular, stable, steady, fixed, uniform, even, level, invariable, unvarying, unchanging, changeless, undeviating, unfluctuating, immutable
ANTONYMS

inconstant, variable

3‘a constant friend’

SYNONYMS
faithful, loyal, devoted, true, fast, firm, unswerving, unwavering
steadfast, staunch, stalwart, dependable, trustworthy, trusty, reliable, dedicated, committed
bosom, boon
ANTONYMS

inconstant, fickle

4‘there is a need for constant vigilance’

SYNONYMS
steadfast, steady, resolute, determined, persevering, tenacious, dogged, unwavering, unflagging, unshaken

noun

1‘dread of cancer has been a constant during the last 100 years’

SYNONYMS
unchanging factor, unchanging state of affairs, unchanging situation, given