earthquake vs temblor

earthquake and temblor both are nouns.

Word	Noun	Adjective	Verb	Adverb
earthquake	Yes	No	No	No
temblor	Yes	No	No	No

As nouns, earthquake and temblor are synonyms defined as:

earthquake and temblor: shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

Other synonyms of earthquake include quake, seism.

earthquake (noun)	temblor (noun)
shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity	shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity
a disturbance that is extremely disruptive