periodical

As adjectives the difference between cyclical and periodical

is that cyclical is recurring at regular intervals while periodical is periodic.

As a noun periodical is

a publication issued regularly, but less frequently than daily.

As nouns the difference between periodical and yed

is that periodical is a publication issued regularly, but less frequently than daily while yed is (archaic) a saying or yed can be a burrow; a hole made by an animal in the ground or yed can be .

As an adjective periodical

is periodic.

As a verb yed is

(archaic) to speak; sing or yed can be to burrow underground, as a rabbit or mole; also said of miners.