滑る

1. godan verb, intransitive to slide; to glide; to skate; to ski
2. to slip; to skid
3. to be slippery
4. godan verb, transitive, intransitive to fail (an examination)
5. to lose (a position); to be demoted
6. godan verb, intransitive, colloquial to bomb (when telling a joke); to fall flat
7. usually in kana, go (game), usu. スベる to slide (move)

ぬめる

1. godan verb, intransitive, usually in kana to be slippery; to be slimy
2. archaic to behave charmingly; to walk merrily