unfrivolous
nonfrivolous
nonfrugivorous
ungarrulous
uninsipid
unquirky
uncumbersome
unrakish
nongreedy
ungreedy
nongratuitous
unwasteful
unfinicky
nonwasteful
unfrugal
unmonistic
ungimmicky
nonmonist
nonmonistic
unduplicitous
nonnegligent
unprohibitive
unnegligent
unfickle
undebauched
unextravagant
unprudish
unfeeble
nondeductive
unquerulous
unfulsome
unminimizable
undaunting
untempted
unsurreptitious
unfaddish
unsuckable
ungaudy
nondeprivable
unpromiscuous
infrugal
unreprehensible
unimpetuous
nonfanciful
nonreprehensible
unfatuous
untravestied
unmiscible
unsolicitous
nonpromiscuous
unguerdoned
unflabby
nonostentatious
untiresome
undetestable
unsquandered
unindulgent
nonindulgent
unsuckered
unlofty
fribble
nonspoilable
nonopportunistic
uninviting
unpretentious
nondesirous
unopportunistic
nondiscardable
unpretending
undistasteful
unstrenuous
unirksome
undiscardable
nonfrilly
unostentatious
unperilous
nondeferential
unselfish
unfacile
untempting
unfrilly
unlousy
unmistrustful
unirascible
unflaky
unspoilable
nonstrenuous
nonflaky
inopportune
unpropitious
nonlimitative
unexpeditious
cheap and cheerful
nondraggable
unimposing
unfurbished
unobsequious
unmeddlesome
unbegirt
unfrivolous
nonfrivolous
nonfrugivorous
ungarrulous
uninsipid
unquirky
uncumbersome
unrakish
nongreedy
ungreedy
nongratuitous
unwasteful
unfinicky
nonwasteful
unfrugal
unmonistic
ungimmicky
nonmonist
nonmonistic
unduplicitous
nonnegligent
unprohibitive
unnegligent
unfickle
undebauched
unextravagant
unprudish
unfeeble
nondeductive
unquerulous
unfulsome
unminimizable
undaunting
untempted
unsurreptitious
unfaddish
unsuckable
ungaudy
nondeprivable
unpromiscuous
infrugal
unreprehensible
unimpetuous
nonfanciful
nonreprehensible
unfatuous
untravestied
unmiscible
unsolicitous
nonpromiscuous
unguerdoned
unflabby
nonostentatious
untiresome
undetestable
unsquandered
unindulgent
nonindulgent
unsuckered
unlofty
fribble
nonspoilable
nonopportunistic
uninviting
unpretentious
nondesirous
unopportunistic
nondiscardable
unpretending
undistasteful
unstrenuous
unirksome
undiscardable
nonfrilly
unostentatious
unperilous
nondeferential
unselfish
unfacile
untempting
unfrilly
unlousy
unmistrustful
unirascible
unflaky
unspoilable
nonstrenuous
nonflaky
inopportune
unpropitious
nonlimitative
unexpeditious
cheap and cheerful
nondraggable
unimposing
unfurbished
unobsequious
unmeddlesome
unbegirt
English words for 'Not frivolous'
As you may have noticed, above you will find words for "Not frivolous". Hover the mouse over the word you'd like to know more about to view its definition. Click 
to find a better fitting word. Finally, thanks to ChatGPT, the overall results have been greatly improved.
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antibody
nothing can be done
perfectionist
crating
thrombin
scarlet fever
sailing ship
deep purple
trackback
Preceding
not erect
diaphragmatic breathing
rays
A female given name from Urdu
flood myth
silver coin
lung disease
rule by robots
degenerate
to clobber
Homeless
winter clothes
chopper
The condition of being informative
one's own room
a simpleton.
not fun
thanks a lot
washer
from year to year
rotating
down time
stabilizer
treacle
high-technology
divine inspiration
a prophet.
NLP
political crime
fanciful
mechanical.
to carry on
to slacken
shaman
bound
eradication
stimulation
to decide
to judge
trifling