solos
"A man, a plan, a canal, Panama!" is a palindrome that means alone. It reads the same backward as forward.
solos
lonely Tylenol
solos
solo
Solos
solos
tot, solos
In the plural, it's solos.
The plural noun "solos" refers to things done (alone) by people themselves. The singular "solo" can be used as an adverb meaning by oneself alone.
"Aha" is a palindrome that can be used as a preposition.