all a sudden (adverb) suddenly: unexpectedly
Sinonime: accord,
agree, appertain,
apply,
associate, attach to, be a component, be a constituent, be a part, be akin, be an adjunct of, be connected with, be fitting, be linked with, be related, be relevant,
bear, bear upon,
become, befit, chime,
concern,
correlate,
correspond,
exist,
fit,
go, go with,
harmonize, have relationship to, have respect to, have to do with, inhere,
match,
permeate,
pertain,
refer,
regard,
reside,
set, suit,
touch, vest
Antonime: expectedly,
slowly