Definitions:
exist

occur; take place

having the state, quality, identity, nature, role, etc., specified

say

used with a present participle to form continuous tenses

used with a past participle to form the passive voice

used to indicate something that is due or destined to happen

used with the past participle of intransitive verbs to form perfect tenses

the chemical element beryllium.

bachelor of education.

bachelor of engineering.

bill of exchange.