Synonyms of the word

before

• prep. Earlier than (in time).
• prep. In front of in space.
• prep. In the presence of.
• prep. Under consideration, judgment, authority of (someone).
• prep. In store for, in the future of (someone).
• prep. In front of, according to a formal system of ordering items.
• prep. At a higher or greater position in a ranking.
• adv. At an earlier time.
• adv. In advance.
• adv. At the front end.
• conj. in advance of the time when.
• conj. (informal) rather or sooner than.

ahead

• adv. In or to the front; in advance; onward.
• adv. In the direction one is facing or moving.
• adv. In or for the future.
• adv. At an earlier time.
• adv. Having progressed more.

earlier

• adj. comparative form of early: more early.
• adj. occurring previously.
• adv. comparative form of early: more early.
• adv. previously; before now; sooner.