short-tempered vs irascible

short-tempered and irascible both are adjectives.

Word	Noun	Adjective	Verb	Adverb
short-tempered	No	Yes	No	No
irascible	No	Yes	No	No

As adjectives, short-tempered and irascible are synonyms defined as:

Other synonyms of short-tempered include choleric, hot-tempered, hotheaded, quick-tempered.

short-tempered (adjective)	irascible (adjective)
quickly aroused to anger	characterized by anger
	quickly aroused to anger