ewe
female and male
No, "sister" is not an adverb. It is a noun that refers to a female sibling. Adverbs typically describe how, when, where, or to what extent an action is carried out.
Ewe is a palindrome meaning female sheep.
No, sister is a noun, a singular, common noun; a word for a female sibling, a word for a person.
Level is a palindrome meaning flat or even.
Madam
There are no one-word synonyms for 'palindrome'.
A palindrome for "male" could be "elam," and a palindrome for "female" could be "emalf." Both are safe for kids to see and understand.
ewe
ewe
ewe