固唾を呑む[katazuwonomu] to hold one's breath (in fear, anxiety, etc.)
唾き[tsubaki] saliva
唾液[daeki] saliva
眉唾物[mayutsubamono] fake
唾液腺[daekisen] salivary gland

生唾[namatsuba] saliva (in one's mouth)
唾棄[daki] contemptuous
虫唾[mushizu] heartburn
虫唾が走る[mushizugahashiru] to be disgusted with (wouldn't touch with a pair of tongs)
固唾[katazu] saliva held in one's mouth during times of tension