vomere, infinitive of vomō 'to vomit', also a passive = vomeris 'you're vomited'
vomēre, future passive = vomēris 'you will be vomited'
vōmere, ablative singular of vōmer vōmeris 'ploughshare', also a word for 'penis'
And so also:
vomerem, imperfect subjunctive 'I would vomit'
vōmerem, accusative singular of vōmer
Worth mentioning also vomerēs 'you would vomit' (imperfect subjunctive) vs. the nominative/accusative plural vōmerēs 'ploughshares'.
• retina - a rein to drive horses with. Attested in early medieval Latin, derived from retineō retinēre. The Romance descendants (Spanish rienda, Italian rèdine) show the word was stressed on re-, and that the vowel quality was (the descendant sound of) Classical (and Late) /ɛ/.
• rētīna - feminine of rētīnus, 'in the shape of a net'. Attested in medieval Latin proper, particularly when talking about the "tunica rētīna" of veins and arteries that is found around the eye, i.e. the retina. I'm simply following the normal composition of a stem (rēte) and a suffix (-īnus) for the macrons here.