formal complaint (noun) protest: complaint, disapproval
Sinonime: absorb,
amalgamate,
assimilate, be swallowed up, become lost in, become partners,
blend,
cement, centralize,
coalesce,
combine, come aboard,
compound,
conglomerate,
consolidate,
converge, deal one in,
fuse, hitch on, hook up, immerge,
incorporate, interface, intermingle, intermix,
join, join up, line up,
marry,
meet,
meld, melt into,
mingle,
mix,
network, plug into,
pool, slap on, submerge,
synthesize, tack on,
tag, team up, throw in together, tie in,
uniteAntonime: divide,
part,
separate