I was just searching for "If You Don't Cry", the twee 80's sounding country-pop ballad from Magnetic Fields' 69 Love Songs, by typing in the word "cry". And all of a sudden, this brilliant compilation formed before my eyes made up of songs with the word 'cry' in the title - old soul stuff, Ariel Pink, French Kicks, Goldfrapp, Immortal Lee County Killers, Mazzy Star, Sterling Roswell, Von Bondies - it's brilliant!
I have also noted this effect with "animal". I think I might try "wind" and "death" next.
Anyone else got a good keyword to make an automatic compilation with?