matching up
phrasal verbUK /ˈmætʃɪŋ ʌp/
US /ˈmætʃɪŋ ʌp/
Putting two things together because they are the same or go together.
She is matching up the socks by color.
OTHER MEANINGS
2. Checking that two sets of information are the same.
The teacher is matching up the names with the test papers.
3. Being the same as or agreeing with something else.
His story is not matching up with what the others said.
4. Finding a good partner or fit for someone or something.
The agency is matching up volunteers with local charities.