Exceed means to go beyond an amount or limit, as in exceeding a budget. Accede means to agree to something, or to take up an office or position. They share the Latin root cedere (to go, yield), which is why they can look alike, but their everyday meanings do not overlap.
The core difference
Exceed is about surpassing a limit; accede is about agreeing or assuming a position.
- exceed — go beyond a limit or surpass something: His expenses exceeded the budget by a wide margin.
- accede — agree to a request, or take up an office: The company acceded to the union's demands.
How to tell them apart
Both words trace back to the Latin cedere, meaning to go or yield, which is also the root of cede. Exceed adds ex- (out), suggesting going out beyond a boundary. Accede adds ad- (to, toward), suggesting moving toward and agreeing with something. Thinking of the prefix as a direction, out versus toward, helps keep the pair straight.
Accede almost always takes to before its object (accede to a request, accede to the throne), so if the sentence needs to, that is a strong sign the writer wants accede, not exceed.