prefix

trans
1. transact
2. transactional
3. transactivate
4. transactor
5. transaxle
6. transceiver
7. transcend
8. transcontinental
9. transcribe
10. transcriptionist
11. transculturation
12. transcurrent
13. transdermal
14. transduce
15. transducer
16. transduction
17. transection
18. transelement
19. translate
20. transport

sub
1. subacid
2. subacute
3. subaerial
4. subagent
5. subaltern
6. subapical
7. subaqueous
8. subarid
9. subassembly
10. subaudition
11. subcelestial
12. subcellular
13. subchaser
14. subclinical
15. subcommittee
16. subcompact
17. subconference
18. subconscious
19. subdean
20. subway

fore
1. forearmed
2. forebear
3. forebode
4. forecited
5. foreclose
6. forecourt
7. foredoom
8. forefinger
9. forefront
10. foregather
11. foregift
12. forego
13. foreground
14. forehand
15. forehanded
16. forehead
17. foreign
18. forejudge
19. foremanship
20. forever

inter
1. interact
2. interagency
3. interblend
4. intercede
5. intercept
6. interchange
7. intercity
8. intercom
9. intercommunal
10. intercommunicate
11. interconnect
12. interconvert
13. intercultural
14. intercurrent
15. interdate
16. interdepartmental
17. interdepend
18. interesting
19. interfacing
20. international