A list of single words that are palindromes.

• abba
• aha
• aibohphobia
• alula
• anna
• ava
• bib
• bub
• cammac
• civic
• dad
• deed
• deified
• deleveled
• detartrated
• devoved
• dewed
• did
• dud
• eke
• elle
• ere
• esssse
• eve
• evitative
• ewe
• eye
• gag
• gig
• Glenelg
• hannah
• havivah
• huh
• kayak
• kinnikinnik
• kook
• lemel
• level
• lil
• maam
• madam
• malayalam
• minim
• mom
• mum
• murdrum
• noon
• nun
• ogopogo
• otto
• pap
• peep
• peeweep
• pep
• pip
• pop
• poop
• pup
• racecar
• radar
• redder
• redivider
• refer
• reifier
• repaper
• reviver
• rotator
• rotavator
• rotor
• sagas
• sees
• sexes
• shahs
• sis
• solos
• sos
• stats
• tat
• tenet
• terret
• testset
• tnt
• toot
• tot
• tut
• wow

Do you know any more that I can add? They have to be single words, so that narrows it down a bit.