U-boat /ūˈbōt or (German) ooˈ/

A German submarine

• mother-to-be
• mother tongue
• mother tongues
• mother water
• mother wit
• motherwort
• motherworts
• mothery
• moth-flower
• moth-flowers
• moth-hunter
• moth-hunters
• mothier
• mothiest
• mothproof
• moths
• mothy
• motier
• motiest
• motif
• motifs
• motile
• motiles
• motilities
• motility