early vs earlier

early and earlier both are adjectives.

Word	Noun	Adjective	Verb	Adverb
early	No	Yes	No	Yes
earlier	No	Yes	No	Yes

early (adjective)	earlier (adjective)
at or near the beginning of a period of time or course of events or before the usual or expected time	(comparative and superlative of `early') more early than; most early
of an early stage in the development of a language or literature
being or occurring at an early stage of development
belonging to the distant past
very young
expected in the near future

early (adverb)	earlier (adverb)
before the usual time or the time expected	earlier in time; previously
during an early stage	comparatives of `soon' or `early'
in good time	before now