Hook it up vs Join

When to use each in English, with meaning, register, and examples.

Hook it up

InformalTop 3,000 (common)

Join

Top 1,000 (very common)A1verb
Most formal: JoinMost common: Join
 Hook it upJoin
Pronunciation🇬🇧 //hʊk ɪt ʌp//🇺🇸 //hʊk ɪt ʌp//🇬🇧 /["/dʒɔɪn/","/dʒɔɪnz/","/dʒɔɪnd/","/ˈdʒɔɪnɪŋ/"]/🇺🇸 /["/dʒɔɪn/","/dʒɔɪnz/","/dʒɔɪnd/","/ˈdʒɔɪnɪŋ/"]/
MeaningConnect or set something up.to come together with others
ExampleCan you hook it up to the TV?I decided to join a yoga class to improve my flexibility.
RegisterInformalNeutral
How commonTop 3,000 (common)Top 1,000 (very common)
CEFR level-A1
Part of speechverb
Collocationshook it up to, hook it up with, hook it up forformally, officially, voluntarily, want to, wish to, flock to, an invitation to join something, together, eagerly, gladly, wish to, invite somebody to, be allowed to, for, in, with, come and join somebody, an invitation to join somebody/​something
Antonyms-leave, split, detach
Common mistakesUsing it in formal contexts, like business emails., Confusing it with 'hook up' (which can also mean to meet someone romantically).'Join' is often confused with 'meet' — they have different meanings., Learners forget to use 'join' with an object, saying 'I join' instead of 'I join the club.', Mixing up 'join' with 'attend' — attending can imply being present without being an active participant.
Usage notesTypically used in casual conversations. It's not suitable for formal writing or professional settings.Use 'join' when indicating participation in an activity or becoming part of a group. It's neutral and can be used in both formal and informal contexts. Avoid using it in overly formal writing.

See it in real clips

Hook it up
Join

Frequently asked questions: Hook it up vs Join

What's the difference between Hook it up and Join?

Hook it up: Connect or set something up. Join: to come together with others

Which is more formal: Hook it up and Join?

Join is the most formal of these.

Which is more common: Hook it up and Join?

Join is the most common in everyday English.

Can you show an example of each?

Hook it up: Can you hook it up to the TV? Join: I decided to join a yoga class to improve my flexibility.

Can I use Hook it up and Join interchangeably?

Not always. Hook it up and Join are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

Related comparisons