The category "<a_a_v>" can be expressed as follows:

<a_a_v>

aav

aav command

aav command group

aav command groups

aav command team

aav command teams

aav commands

aav miclic

aav miclics

aav-c7

aav-c7s

aav-r7

aav-r7s

aavs

amphibious assault vehicle

amphibious assault vehicles

amphtrac

amphtracs

amtrac

amtracs

c2aav

c2aavs

lvt-c7

lvt-c7s

lvt-p7

lvt-p7s

lvt-r7

lvt-r7s

mine aav

mine aavs

mine clearing aav

mine clearing aavs