/ɜː/ in PERSON, BIRD, TURN, WORD, LEARN
Stressed ER + consonant
Definition of BERTH
Definition of KERB
Definition of SERMON
Listen to WERE said both (1) unstressed /wə/ and (2) stressed /wɜː/...
Stressed IR + consonant
Images of FIR TREES
Stressed UR + consonant
Definition of MURMUR
Stressed WOR + consonant
Be careful of these two, which look like they belong to the same family... but don't...