Sinisterly synonyms | adverbs

Synonyms for Sinisterly as an Adverb

• ominously
• darkly
• eerily
• grimly
• threateningly
• uncannily
• bizarrely
• creepily
• mysteriously
• preternaturally
• supernaturally
• spookily
• weirdly
• bloodcurdlingly
• formidably
• fearfully
• unnervingly
• chillingly
• hauntingly
• forebodingly
• spectrally
• fantastically
• phantasmatically
• monstrously
• otherworldly
• unusually
• morbidly
• menacingly
• inauspiciously
• portentously
• warningly
• enigmatically
• with intent
• disconcertingly
• strangely
• gruesomely
• macabrely
• horrifyingly
• unnaturally
• insanely
• unwholesomely
• balefully
• forbiddingly