Common words that rhyme with nonchalant include slant, transplant, ungallant, stridulant, penchant, warrant, piquant, courant, unimportant, pleasant, relevant, repentant, radiant, fulgurant and vibrant.
Plant growth depends on sunlight.
The smell triggered instant disgust.
A significant difference is evident.
The court issued a warrant for his absconding.
Everyone praised her brilliant performance.
His comment seemed insignificant in the grand scheme.