Chemical terms

carbonyl: C=O
carboxyl: COOH
carboxylic acid: COOH
amide(pronunciation i:): O=C-NR(R')
amine(pronunciation i:): NRR'R''
ammonia: NH3

imide: O=C-N-C=O
carbodiimide: N=C=N
amino acid: R-N-C-COOH