sotto voce

adj 0.625

sub rosa

adj 0.590

pocket

adj 0.556

private

adj 0.554

secret

adj 0.552

closeted

adj 0.550

tenuto

adj 0.539

closet

adj 0.530

closely held

adj 0.528

undisclosed

adj 0.527

inside

adj 0.525

het

adj 0.521

unexpressed

adj 0.520

covert

adj 0.519

unspoken

adj 0.517

en suite

adj 0.516

confidential

adj 0.515

under cover

adj 0.515

bosom

adj 0.515

hidden

adj 0.511

innerly

adj 0.510

gardant

adj 0.510

ritenuto

adj 0.507

inshell

adj 0.507

hush-hush

adj 0.507

unsaid

adj 0.507

in house

adj 0.505

contained

adj 0.504

enclosed

adj 0.501

privy

adj 0.501

undercover

adj 0.500