faster faster faster
fast fast fast
adj adj adj
faster faster faster .
f æ s t ə ɹ WORD_BOUNDARY f æ s t ə ɹ WORD_BOUNDARY f æ s t ə ɹ WORD_BOUNDARY
f a s t e r WORD_BOUNDARY f a s t e r WORD_BOUNDARY f a s t e r WORD_BOUNDARY