Acolyte.
Monster
two (2) letter word: nu. five (5) letter word: nairu. six (6) letter word: nilgau. seven (7) letter word: nilghau. nouveau. nylghau. eight (8) letter word: nunchaku.
Algebra, alfalfa, ammonia, amnesia and antenna are 7 letter words. They begin and end with the letter a.
Harmony
Answers
pintail.
titanic
END
showbiz
Subzero
dawning
examine