Find out the items in the list given below that are odd out among the others in the following group: (1) warning, (2) shower, (3) heat, (4) pour, (5) lightning, (6) noise, (7) humidity, (8) gale, (9) snowdrift.

Find out the items in the list given below that are odd out among the others in the following group: 
(1) warning, (2) shower, (3) heat, (4) pour, (5) lightning, (6) noise, (7) humidity, (8) gale, (9) snowdrift.  

на