1) Appear again 2) Appear at intervals 3) Appear over 4) Arise anew 5) Be cyclical 6) Become chronic 7) Come about 8) Come again 9) Come again to mind 10) Come again, like a nightmare 11) Come around again 12) Come back 13) Come to mind again 14) Come to mind again and again 15) Come up again 16) Come up again and again 1) Repeat 
• (v. i.) To resort; to have recourse; to go for help. • (v. i.) To occur at a stated interval, or according to some regular rule; as, the fever will recur to-night. • (v. i.) To come back; to return again or repeatedly; to come again to mind.
To come back or to return.
1. To come back; to return again or repeatedly; to come again to mind. 'When any word has been used to signify an idea, the old idea will recur in the mind when the word is heard.' (I. Watts) ... 2. To occur at a stated interval, or according to some regular rule; as, the fever will recur to-night. ... 3. To resort; to have recourse; to go for help...
Re·cur' intransitive verb [ imperfect & past participle Recurred (-k?rd'); present participle & verbal noun Recurring .] [ Latin recurrere ; prefix re- re- + currere to run. See Current .] 1. To com...
Recur: To occur again. To return. Any symptom (such as fatigue), any sign (such as a heart murmur), or any disease can recur.
[v] - return in thought or speech to something 2. [v] - happen or occur again
Come back - cancers may recur after they are first treated.