I want to say that two people established a good rapport. But the context is quite informal, and "established" sounds stuffy in my context. What other verb(s) could I use in place of establish here?
Edit: I've been asked for more information about the context. Background: my son, M., was resisting going to the suggested appointments with the school social worker, Ms. D. Email to school point person:
M. went to the first appointment with Ms. D. today. They (started to establish) rapport, and [etc].
I would like to know more verbs that can be used with rapport instead of establish. The ones I already knew were build, create, feel, get going (i.e. get a good rapport going). Also, I'm not sure when to use an article and when to use a qualifier (e.g. built rapport, built a rapport, built good rapport, built a good rapport). I'm wondering if the concept of good is built in already.