whiff
noun
2 British, informal there's a terrible whiff in here:
stench, stink, foul smell, reek, fetidness, effluvium, miasma;
British, informal pong, niff, hum;
British, rhyming slang pen and ink;
Scottish, informal guff;
North American, informal funk;
rare fetor, malodour, mephitis, noisomeness.
3 there was the faintest whiff of irony in his letter:
trace, hint, note, suggestion, impression, suspicion, soupçon, touch, nuance, intimation, trifle, drop, dash, tinge, tincture, streak, vein, shred, crumb, shadow, breath, whisper, air, savour, flavour, element, overtone, scintilla, jot, bit, spot, speck, iota;
informal smidgen, tad.
whiff (1) Oxford Dictionary of English