recur

As a noun repetition

is repetition.

As a verb recur is

to have recourse (to) someone or something for assistance, support etc.

As a noun happen

is morsel.

As a verb recur is

to have recourse (to) someone or something for assistance, support etc.

As verbs the difference between advert and recur

is that advert is to turn attention while recur is to have recourse (to) someone or something for assistance, support etc.

As a noun advert

is (british|informal) an advertisement, an ad.

In computing|lang=en terms the difference between recur and return

is that recur is (computing) to recurse while return is (computing) a return value: the data passed back from a called procedure.

As verbs the difference between recur and return

is that recur is to have recourse (to) someone or something for assistance, support etc while return is to come or go back (to a place or person).

As a noun return is

the act of returning.

As verbs the difference between reproduce and recur

is that reproduce is to produce an image or copy of something while recur is to have recourse (to) someone or something for assistance, support etc.

In lang=en terms the difference between flare and recur

is that flare is to cause to burn while recur is to happen again.

As verbs the difference between flare and recur

is that flare is to blaze brightly while recur is to have recourse (to) someone or something for assistance, support etc.

As a noun flare

is a source of brightly burning light or intense heat used to attract attention in an emergency, to illuminate an area, or as a decoy.

As an adjective residual

is of, relating to, or remaining as a residue; left over.

As a noun residual

is a remainder left over at the end of some process.

As a verb recur is

to have recourse (to) someone or something for assistance, support etc.

As a noun recovery

is the act or process of regaining or repossession of something lost.

As a verb recur is

to have recourse (to) someone or something for assistance, support etc.

As verbs the difference between recur and recurs

is that recur is to have recourse (to) someone or something for assistance, support etc while recurs is (recur).

As a verb recur

is to have recourse (to) someone or something for assistance, support etc.

As an adjective perennial is

lasting or remaining active throughout the year, or all the time.

As a noun perennial is

a perennial plant; a plant that is active throughout the year or survives for more than two growing seasons compare (annual), (biennial).