Synonyms for Squeaking (same or very similar meaning)
WordNet sense 1 (having or making a high-pitched sound such as that made by a mouse or a rusty hinge):
screechy, squeaky, screaky, squealingWordNet sense 2 (used of sounds and voices; high in pitch or frequency):
high, high-pitchedFrom the ODE community, based on WordNetadd/edit