age-mate
noun
ˈāj-ˌmāt 
: one who is of about the same age as another
Word History
First Known Use
1582, in the meaning defined above
- thunder egg
- thunder god vine
- thunder lizard
- thunder mug
- thunder pumper
- thunder sheet
- thunder snake
- thunder-and-lightning
- thunder-blasted
- thunder-gust
- thunderation
- thunderations
- thunderball
- thunderbird
- thunderbirds
- thunderbolt
- thunderbolts
- thunderboxes
- thunderclap
- thunderclaps
- thundercloud
- thunderclouds
- thundercrack
- thundered
- thunderer