Synonyms of the word

else

• adj. (postpositive, used only with indefinite or interrogative pronouns) Other; in addition to previously mentioned…
• adv. (follows interrogative adverbs) Otherwise, if not.
• conj. For otherwise; or else.
• conj. (computing, in many programming languages and pseudocode) but if the condition of the previous if clause…

other

• adj. See other (determiner) below.
• adj. second.
• adj. Alien.
• adj. Different.
• adj. (obsolete) Left, as opposed to right.
• n. An other one, more often rendered as another.
• n. The other one; the second of two.
• adv. Apart from; in the phrase "other than".
• adv. (obsolete) otherwise.
• v. (transitive) To make into an other.
• v. (transitive) To treat as different or separate; segregate; ostracise.
• v. (transitive) (ethnicity or race) To label as "other".
• conj. (obsolete) Or.