lancealate looks like two words. It is one.
schwaThree of the five vowels in lanceolate are unstressed. The ear gets a blur and the fingers pick a letter.
heard aslancealate
spelledlanceolate
saidLAN-see-uh-layt
One word, spelled lanceolate.
This one is worth a second look, because alate is a real botanical word: it means winged, of a stem or a stalk. Lance plus alate reads like a compound that ought to exist. It does not. The word is a single Latin adjective and the o in the middle belongs to lanceola, not to a second word.
Also filed here
lanceulate lanseolate lanceollate lanceolat lanceelate lanceolute
Each one has a page of its own. All 7 spellings of lanceolate.