Common words that rhyme with decant include significant, intoxicant, vacant, instant, warrant, piquant, courant, extant, distant, relevant, repentant, gallant, irradiant, flamboyant and exuberant.
A significant difference is evident.
His comment seemed insignificant in the grand scheme.
Her abdication left the throne vacant.
The smell triggered instant disgust.
The court issued a warrant for his absconding.
Everyone praised her brilliant performance.