Letters that make unadoptable
a, o, b, d, e, l, n, p, t, u are letters that make 'unadoptable'
Words within unadoptable
tab, table, AB, ab, DO, do, ad, UN, opt, adoptable, able, AD, ado, LE, Pt, Na, Ta, NAD, Ab, adopt are words within 'unadoptable'