The ru-verb(godan verb/consonant verb) "taberu" doesn't exist. "Taberu" ALWAYS cunjugates as an u-verb(ichidan verb/vowel verb).
past
○tabeta ×tabetta
negative
○tabenai ×taberanai
polite
○tabemasu ×taberimasu
te-form
○tabete ×tabette
potential
○taberareru ×tabereru(Although this is actually used in conversation. So-called ら抜き言葉)
causative
○tabesaseru ×taberaseru
imperative
○tabero ×tabere
volitional
○tabeyou ×taberou
Here's a list of homonyms.(not so many)
いる(ru-verb 要る u-verb 居る)
かえる(ru-verb 帰る u-verb 変える)
きる(ru-verb 切る u-verb 着る)
ねる(ru-verb 練る u-verb 寝る)
へる(ru-verb 減る u-verb 経る)
In these verbs, two types of conjugation exist, e.g., "kaeta(変えた) vs. kaetta(帰った)". You can recognize verbs from that. (As you can see, they have different kanji, and often different pitch accents, in most cases.)