interfile /in-tər-fīlˈ/

1. To place among other items in a file
2. To combine in one file

• washboard
• washboards
• wash-bottle
• wash-bottles
• washbowl
• washbowls
• washcloth
• washcloths
• washday
• washdays
• wash-dirt
• wash down
• wash drawing
• wash drawings
• washed
• washed-out
• washed-up
• washen
• washer
• washer-drier
• washer-driers
• washer-dryer
• washered
• washeries
• washering