Synonyms of intervening

1 Syllable
tween
2 Syllables
middler, amidst, halfway, midmost, betweens, middle, midway, soso, between, 'tween, betwixt, mezzo
3 Syllables
middlemost, medially, interim, sandwiched, centermost
4 Syllables
interceding, transitional, thrown-together
5 Syllables
intermediate