blue + berry → blueberry
verb-noun compound: work + room
→ workroomnoun-verb compound: breast + feed → breastfeed
verb-verb compound: stir + fry → stir-fry
adjective-verb compound: high + light → highlight
verb-preposition compound: break + up → breakup
preposition-verb compound: out + run → outrun
adjective-adjective compound: bitter + sweet → bittersweet
preposition-preposition compound: in + to → into