words ending in astic

2 Syllables: clastic
drastic
mastic
plastic
spastic
3 Syllables: bombastic
dynastic
elastic
fan-tas-tic
fantastic
gymnastic
monastic
sarcastic
scholastic
4 Syllables: inelastic
paraphrastic
periphrastic
thermoplastic
5 Syllables: ecclesiastic
encomiastic
enthusiastic

Now you can make multisyllabic rhymes in the new rhymit app :)